Upgrading heads 195cc to 220cc's.
02-02-2013, 12:39 AM
#1
Race Director
Thread Starter
Upgrading heads 195cc to 220cc's.
The 421 is due for an upgrade. This will be the final upgrade in regards to the engine (stop laughing *****).
I have decided to sell my 195 cc AFR comp ports, and buy some 220 cc AFR comp ports.
The 195's did very well considering they poured in at 196cc, but the port was a tad small for the cubes. The heads flowed an honest 303 cfm which was incredible.
So time will tell but the heads will be put on in the spring sometime, and I am curious as to what gains will be had.
The old combo dynoed 434 rwhp 471 rwtq with the ****** B&B reasonator which certainly doesnt help hp but it does quiet the exhaust note.
I am of the opinion with the reasonator removed, and the x pipe installed and a little more tuning 450rwhp 480 rwtq wasnt out of the question.
Miniram too!
The question is......What gains with the bigger ports?
(B&B's. Not Borla)
I have decided to sell my 195 cc AFR comp ports, and buy some 220 cc AFR comp ports.
The 195's did very well considering they poured in at 196cc, but the port was a tad small for the cubes. The heads flowed an honest 303 cfm which was incredible.
So time will tell but the heads will be put on in the spring sometime, and I am curious as to what gains will be had.
The old combo dynoed 434 rwhp 471 rwtq with the ****** B&B reasonator which certainly doesnt help hp but it does quiet the exhaust note.
I am of the opinion with the reasonator removed, and the x pipe installed and a little more tuning 450rwhp 480 rwtq wasnt out of the question.
Miniram too!
The question is......What gains with the bigger ports?
(B&B's. Not Borla)
Last edited by 88BlackZ-51; 02-02-2013 at 01:03 AM.
02-02-2013, 01:04 PM
#2
Race Director
Hi Rich, the bigger ports should help with the cubic inches you have. It'll be interesting to see what the gains will be.
02-02-2013, 02:20 PM
#3
Race Director
Thread Starter
I am going with 3.45's so this is my thinking as well.....Heads cushion the bottom a bit with some extra legs up top.
02-02-2013, 02:48 PM
#4
Racer
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You really do want to go fast. Which heads did Jim put on his engine...
02-02-2013, 03:54 PM
#5
Race Director
Thread Starter
02-02-2013, 04:40 PM
#7
Max G’s
If you're going to go to a 3.45 rear ratio, you need to get a dyno test with the 195's and then change the heads if you want to see what the true power increase is. 3.45's will show some higher power results over the 3.07's without any change to anything else.
02-02-2013, 06:29 PM
#8
Race Director
Forget the 3.45s. If Rich is running a 6 speed, he should go with 4.10s
I think the power gains will be well worth the effort. I would think you will pick up at least 25hp.
02-02-2013, 09:01 PM
#12
Team Owner
Member Since: Oct 2004
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St. Jude Donor '05
Driving it like he hated it as is with 3.45s to 6500 and not shifting it like aunt flo oughta leave him satisified.
It should pick up some Rick forget the dyno the resonator and all that just get to the track and drive that thing.
It should pick up some Rick forget the dyno the resonator and all that just get to the track and drive that thing.
02-02-2013, 09:48 PM
#13
Race Director
amen to this.
Are you getting heads a little bigger cc so you will have a CR thats blower-friendly?
BTW. I dont believe you need lousy 9.0:1 compression ratio for a centrifugal blower spraying methanol to cool the intake.
I think the optimum CR for an 18 psi blower is more like 10.0:1.
Modern technology (methanol injection) has changed the game again when it comes to compression ratios and blowers.
Crap the LSx guys run 10.5, 11.0:1 and pour 18 psi boost thru their combos to make insane power.
Are you getting heads a little bigger cc so you will have a CR thats blower-friendly?
BTW. I dont believe you need lousy 9.0:1 compression ratio for a centrifugal blower spraying methanol to cool the intake.
I think the optimum CR for an 18 psi blower is more like 10.0:1.
Modern technology (methanol injection) has changed the game again when it comes to compression ratios and blowers.
Crap the LSx guys run 10.5, 11.0:1 and pour 18 psi boost thru their combos to make insane power.
02-02-2013, 09:56 PM
#14
Instructor
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Location: Pickering Ontario
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Hi Rick
I think you will see a big bump in power. I found when I went to the 220 heads and full 3 inch duals, with hi flow cats the engine woke up big time.
You might want some shaft rockers to go with the heads just to keep things stable.
Good luck and have fun.
Brian
I think you will see a big bump in power. I found when I went to the 220 heads and full 3 inch duals, with hi flow cats the engine woke up big time.
You might want some shaft rockers to go with the heads just to keep things stable.
Good luck and have fun.
Brian
02-02-2013, 10:16 PM
#15
Le Mans Master
From the builder himself. The torque numbers are very impressive of this build, personally. A motor with V10 torque that can sweep past 6,000 rpm. The heads won't be the last stop..... Jim likes his spray, wouldn't be surprised if he put that bug in your ear. Makes his car look sped up on footage when he hits it.
02-03-2013, 04:40 AM
#16
Melting Slicks
Hey Rick,
Why not go with the 235 ?? They only have a MCSA of 2.47 at the pinch with plenty of velocity to work fine on the street, dont get all caught up with the CC #s . You have a 421 CI with good amount of CR, why choke it with a small head ?
Why not go with the 235 ?? They only have a MCSA of 2.47 at the pinch with plenty of velocity to work fine on the street, dont get all caught up with the CC #s . You have a 421 CI with good amount of CR, why choke it with a small head ?
Last edited by red L98; 02-03-2013 at 12:59 PM.
02-03-2013, 07:53 AM
#17
Race Director
Thread Starter
The car is a street car with the odd trip to a rd course plus the 220's accept the rockers I have....I understand what you are saying but we think the 220's will let if breath a bit more...We are also going to change up the compression a tad meaning lowering it just a bit. Its getting harder for me to find 94.
Last edited by 88BlackZ-51; 02-03-2013 at 07:56 AM.
02-03-2013, 08:01 AM
#18
Race Director
Thread Starter
From the builder himself. The torque numbers are very impressive of this build, personally. A motor with V10 torque that can sweep past 6,000 rpm. The heads won't be the last stop..... Jim likes his spray, wouldn't be surprised if he put that bug in your ear. Makes his car look sped up on footage when he hits it.
02-03-2013, 09:05 AM
#19
Drifting
Either way it is gonna improve.The mid range and top end charger will be noticeably stronger.The idle vid of yours reminded me of mine.
02-03-2013, 09:14 AM
#20
Race Director
Thread Starter
Yes I think the mid range and top end revs will increase. I remember seeing your dyno curve from a few years back and being impressed. Did you sell your C4?