STOCK L98 HEADS - possible power level ? (2)
11-11-2006, 08:57 AM
#1
Racer
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STOCK L98 HEADS - possible power level ? (2)
Hi guys!
I have STOCK L98 Corvette HEADS, non-ported (is strong cleaned and easily polished), 350, 8:1 CR,
cam 224/224 114lsa, valve lift .562/.562 w/1.6 rr, Ferrea SuperAlloy valves(stock size 1.94 & 1.5), 18-20 psi boost w/twin T62-1's + intercooler + meth.injection.+ tpis MR-I intake w/Monoblade TB
Question:
It is possible to receive 800-900 HP with these STOCK HEADS
in my setup?
It is necessary to change it on aftermarket heads with large flow?
Some guys laugh
, when hear from me, that I want to have "BIG POWER" with STOCK HEADS.
At me of doubt in it is I think, that aftermarket super-flow heads are important ONLY on N/A motor.
I am not right?
Thank.
I have STOCK L98 Corvette HEADS, non-ported (is strong cleaned and easily polished), 350, 8:1 CR,
cam 224/224 114lsa, valve lift .562/.562 w/1.6 rr, Ferrea SuperAlloy valves(stock size 1.94 & 1.5), 18-20 psi boost w/twin T62-1's + intercooler + meth.injection.+ tpis MR-I intake w/Monoblade TB
Question:
It is possible to receive 800-900 HP with these STOCK HEADS
in my setup?It is necessary to change it on aftermarket heads with large flow?
Some guys laugh
, when hear from me, that I want to have "BIG POWER" with STOCK HEADS.At me of doubt in it is I think, that aftermarket super-flow heads are important ONLY on N/A motor.
I am not right?
Thank.
Last edited by divette; 11-11-2006 at 09:46 AM.
11-11-2006, 10:37 AM
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It is possible to receive 800-900 HP with these STOCK HEADS in my setup?
no
It is necessary to change it on aftermarket heads with large flow?
yes you need something better than the stock head
Some guys laugh, when hear from me, that I want to have "BIG POWER" with STOCK HEADS.
At me of doubt in it is I think, that aftermarket super-flow heads are important ONLY on N/A motor.
I am not right?
not in this case
in my setup?no
It is necessary to change it on aftermarket heads with large flow?
yes you need something better than the stock head
Some guys laugh
, when hear from me, that I want to have "BIG POWER" with STOCK HEADS.At me of doubt in it is I think, that aftermarket super-flow heads are important ONLY on N/A motor.
I am not right?
not in this case
11-11-2006, 01:51 PM
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St. Jude Donor '05
Forced induction does just that- forces the extra air though the head so in a lot of cases stockers work fine to a point..Aftermarket usually comes into play after that, air flow is air flow, and 900hp requires a lot of it. JMO.
11-11-2006, 03:04 PM
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Originally Posted by cuisinartvette
Forced induction does just that- forces the extra air though the head so in a lot of cases stockers work fine to a point..Aftermarket usually comes into play after that, air flow is air flow, and 900hp requires a lot of it. JMO.big test of heads:
http://www.chevyhiperformance.com/te.../photo_08.html
For example - we take Stock 163cc and TrickFlow 195cc:
It will be so:
( Stock .500 lift = 196 intake) VS (TrickFlow .500 lift = 250 intake)
(This test be in N/A-mode!!!)
BUT!
Stock + only! 5 PSI - It WILL BE BETTER, than TrickFlow in N/A-mode
Therefore:
(Stock .500 lift + 5 psi = 250+ ) VS (TrickFlow .500 lift = 250)
But, if add +5 psi to both heads, it will be better TrickFlow:
(Stock .500 lift + 5 psi = 250+ ) VS (TrickFlow .500 lift + 5 psi = 250+++ )
TrickFlow it is better, BUT Stock can be performance, if to it give BOOST.
This my opinion
- is ready to listen to a refutation to this.
Last edited by divette; 11-11-2006 at 03:08 PM.
11-11-2006, 05:13 PM
#5
Safety Car
If you give stock heads forced induction, yes they will make power. However, you mention that you want big power.....and stock unported heads will not give you big power....period.
11-11-2006, 05:22 PM
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Originally Posted by TM-96CE
If you give stock heads forced induction, yes they will make power. However, you mention that you want big power.....and stock unported heads will not give you big power....period.
hmmm..
what level of power (HP) is possible on STOCK HEADS at this setup?
No more that HP ?
11-11-2006, 07:29 PM
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St. Jude Donor '05
Forced Induction limits of stock head? 113, 882, or? (both are crap IMO)
No answer to that one. Forced Induction section could better help you out. Ill stick to my guns in that a stock L98 (113) wont be getting 900hp through it.
I have two questions
1-Why spend the money for all the boost and leave junk heads on
2-Your original post sounds like troll bait rather than a sincere question. If you have all the answers fill us in, maybe we could all learn something here. Or maybe I interpreted your post the wrong way?
:taking one for the team:
No answer to that one. Forced Induction section could better help you out. Ill stick to my guns in that a stock L98 (113) wont be getting 900hp through it.
I have two questions
1-Why spend the money for all the boost and leave junk heads on
2-Your original post sounds like troll bait rather than a sincere question. If you have all the answers fill us in, maybe we could all learn something here. Or maybe I interpreted your post the wrong way?
:taking one for the team:
11-11-2006, 09:03 PM
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Originally Posted by cuisinartvette
Forced Induction limits of stock head? 113, 882, or? (both are crap IMO)
No answer to that one. Forced Induction section could better help you out. Ill stick to my guns in that a stock L98 (113) wont be getting 900hp through it.
I have two questions
1-Why spend the money for all the boost and leave junk heads on
2-Your original post sounds like troll bait rather than a sincere question. If you have all the answers fill us in, maybe we could all learn something here. Or maybe I interpreted your post the wrong way?
:taking one for the team:
No answer to that one. Forced Induction section could better help you out. Ill stick to my guns in that a stock L98 (113) wont be getting 900hp through it.
I have two questions
1-Why spend the money for all the boost and leave junk heads on
2-Your original post sounds like troll bait rather than a sincere question. If you have all the answers fill us in, maybe we could all learn something here. Or maybe I interpreted your post the wrong way?
:taking one for the team:
(TT-kit, Susp.,Wheels,Transm,ECU,cage, and more-more ), but did not regard necessary to replace Factory Stock Heads (exceed Ferrea Enconel), I thought that they will be good.Now I began to doubt of it.
The question is sincere .
( I already spoke that began to doubt concerning that,
that I can receive enough power having STOCK heads.)
If I knew on it the answer - I do not become about it so to ask - me the time was a pity
to send the messages.
Dear "cuisinartvette" - What mean these digits - "113" and "882" ?
thanks
Last edited by divette; 11-11-2006 at 09:05 PM.
11-11-2006, 09:13 PM
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St. Jude Donor '05
What surprises me is that article http://www.chevyhiperformance.com/te.../photo_08.html states the 882 which was a run of the mill GM smog head outperformed the 113.
Again, try the forced induction section http://forums.corvetteforum.com/forumdisplay.php?f=87
I know there is a "rule of thumb" formula for estimating projected #s (1 psi=10hp or something like that), thye are the ones to ask. Looks like I took your original post the wrong way.
Again, try the forced induction section http://forums.corvetteforum.com/forumdisplay.php?f=87
I know there is a "rule of thumb" formula for estimating projected #s (1 psi=10hp or something like that), thye are the ones to ask. Looks like I took your original post the wrong way.
11-11-2006, 09:21 PM
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Originally Posted by cuisinartvette
What surprises me is that article http://www.chevyhiperformance.com/te.../photo_08.html states the 882 which was a run of the mill GM smog head outperformed the 113.
Again, try the forced induction section http://forums.corvetteforum.com/forumdisplay.php?f=87
I know there is a "rule of thumb" formula for estimating projected #s (1 psi=10hp or something like that), thye are the ones to ask. Looks like I took your original post the wrong way.
Again, try the forced induction section http://forums.corvetteforum.com/forumdisplay.php?f=87
I know there is a "rule of thumb" formula for estimating projected #s (1 psi=10hp or something like that), thye are the ones to ask. Looks like I took your original post the wrong way.
In Forced Induction section nobody answers my question.
( I sent there question at FI section from the beginning )
11-11-2006, 09:39 PM
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St. Jude Donor '05
Email this guy, he will know. Ive been in his shop, he builds some outrageous forced induction motors . www.nelsonracingengines.com
Check out the vids section!
Heres a TT 427 small block they built http://www.nelsonracingengines.com/v...TSBC00High.wmv
Check out the vids section!
Heres a TT 427 small block they built http://www.nelsonracingengines.com/v...TSBC00High.wmv
Last edited by cv67; 11-11-2006 at 09:46 PM.
11-12-2006, 01:09 AM
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Originally Posted by divette
Question:
It is possible to receive 800-900 HP with these STOCK HEADS in my setup?
I am not right?
.
It is possible to receive 800-900 HP with these STOCK HEADS
in my setup?I am not right?
.
11-12-2006, 05:03 AM
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Originally Posted by redrose
you are correct....with 18-20 psi boost the stock heads will easily make 800 hp....with high boost pressure it is NOT necessary to have large valves or ports because the forced induction does what the ''better'' heads try to do --flow more air....i proved this to be true when using superchargers on jet-pump driven boats which made 1200 hp from 427 cu. in engines (horsepower of those is easy verified by checking RPM against the pump manufacture's ''curve'' graphs)...your exhaust system must be free flowing to achieve the 800 hp level....the ''bottom end'' of your small block engine will need to strengthened very much to hold up to this output level
wow!
yes!
I knew it!
I have good " bottom end " SBC -
GMPP 4-bolt main 350 block + Eagle 4340 forged crank + H-Beams + forged JE + cometic multi-layer steel heads gaskets + all balts ARP
my exhaust is 3" DOWNPIPES from TURBOS ONLY! it down under car and cut!
(put flame in ground) I NOT have Mufflers
(Wastegates have STANDALONE short pipes )
It should hold this power
Last edited by divette; 11-12-2006 at 05:08 AM.
11-12-2006, 11:20 AM
#16
Safety Car
Originally Posted by redrose
you are correct....with 18-20 psi boost the stock heads will easily make 800 hp....with high boost pressure it is NOT necessary to have large valves or ports because the forced induction does what the ''better'' heads try to do --flow more air....i proved this to be true when using superchargers on jet-pump driven boats which made 1200 hp from 427 cu. in engines (horsepower of those is easy verified by checking RPM against the pump manufacture's ''curve'' graphs)...your exhaust system must be free flowing to achieve the 800 hp level....the ''bottom end'' of your small block engine will need to strengthened very much to hold up to this output level
The factory 113 heads will make big power, but not the levels that the poster is after. If I shove 20 psi on a factory engine, I will not get anywhere close to 800WHP, probably not even close to 600WHP. The high boost levels are a function of the resistance to accept the additional air.
Boost is merely a reading of the engines resistance to move airflow. Stacked air.
If you have 20 psi on a 500WHP engine, then you are talking serious engine potential, but not on a factory L98 engine (rated at 245FWHP). Based on psi ratio, I come up with 447 WHP (578 FWHP) at 20 psi from a factory L98. My calcs show that it would take 47.3 psi to make 800 WHP from a factory (stock headed L98).
I hate to see this guy go off with high hopes that are unobtainable.
Aaron
(yes, I am a regular on the FI area).
Last edited by AKS Racing; 11-12-2006 at 10:18 PM.
11-12-2006, 01:31 PM
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Originally Posted by divette
hmmm..
what level of power (HP) is possible on STOCK HEADS at this setup?
No more that HP ?
what level of power (HP) is possible on STOCK HEADS at this setup?
No more that HP ?
11-12-2006, 01:34 PM
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Originally Posted by AKS Racing
I disagree.
The factory 113 heads will make big power, but not the levels that the poster is after. If I shove 20 psi on a factory engine, I will not get anywhere close to 800WHP, probably not even close to 600WHP. The high boost levels are a function of the resistance to accept the additional air.
Boost is merely a reading of the engines resistance to move airflow. Stacked air.
If you have 20 psi on a 500WHP engine, then you are talking serious engine potential, but not on a factory L98 engine (rated at 245FWHP). Based on psi ratio, I come up with 447FWHP at 20 psi from a factory L98. My calcs show that it would take 47.5 psi to make 800FWHP from a factory (stock headed L98).
I hate to see this guy go off with high hopes that are unobtainable.
Aaron
(yes, I am a regular on the FI area).
The factory 113 heads will make big power, but not the levels that the poster is after. If I shove 20 psi on a factory engine, I will not get anywhere close to 800WHP, probably not even close to 600WHP. The high boost levels are a function of the resistance to accept the additional air.
Boost is merely a reading of the engines resistance to move airflow. Stacked air.
If you have 20 psi on a 500WHP engine, then you are talking serious engine potential, but not on a factory L98 engine (rated at 245FWHP). Based on psi ratio, I come up with 447FWHP at 20 psi from a factory L98. My calcs show that it would take 47.5 psi to make 800FWHP from a factory (stock headed L98).
I hate to see this guy go off with high hopes that are unobtainable.
Aaron
(yes, I am a regular on the FI area).
(20/14.7)x245+245=578
11-12-2006, 03:21 PM
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heads
Originally Posted by korvetkeith
Assuming 245fwhp and 20 psi I get 578fwhp?
(20/14.7)x245+245=578
(20/14.7)x245+245=578
All - I have understood.
THIS THEME IS CLOSED - I AM HANDED OVER!
To not receive to me that I want on STOCK heads......
Is insulting to me only for the spent money on Ferrea inconel..... Now it to not be useful.
WHAT PERFORMANCE-HEADS WILL ADVISE TO BUY?
( I while have looked after AFR 195cc (#1040) and TrickFlow 195cc(#30400005) ) - can them buy?
Or, it is possible to buy something better, than these?
Thank beforehand.
Last edited by divette; 11-12-2006 at 03:23 PM.
11-12-2006, 10:22 PM
#20
Safety Car
Originally Posted by korvetkeith
Assuming 245fwhp and 20 psi I get 578fwhp?
(20/14.7)x245+245=578
(20/14.7)x245+245=578
The value mentioned above was WHP, and I accidently listed as FWHP. Bottom line is that 20 psi still does not get you to 550 WHP even if you are starting at 300 FWHP on an L-98.
I think divette is going the right route in looking at aftermarket heads. AFR makes some good heads as do some others.
Aaron