AFR 205's (346 CID) 488 RWHP / 453 RWTQ !!
03-20-2007, 01:26 AM
#1
Drifting
Thread Starter
AFR 205's (346 CID) 488 RWHP / 453 RWTQ !!
Thought I should post up now that my dyno tuning is done. I started out with a stock '98 C5 with VariRam CAI, LGLT headers/high flow CATs that dyno'd at 331 rwhp and 354 torque.
Last Nov/Dec, I tore it down to do a few Christmas mods:
Rick at Synergy brought it all together with the dyno tuning.
Minor challenges were:
Cheers,
John
Last Nov/Dec, I tore it down to do a few Christmas mods:
- ARP Rod Bolts
- ported oil pump
- JWIS Timing Chain
- LG G5X3 112 lsa cam
- AFR-205 58cc heads (ported & blue printed by Tony Mamo)
- AFR 8019 dual valve springs
- Flycut Pistons
- Cometic .040 headgaskets
- Crane 1.7 Gold Roller Rockers
- Hardened pushrods
- LS6 Valley Cover Mod
- FAST 90mm Intake/LS2-90mm TB (ported by Tony Mamo)
- Meziere Water Pump
- 160 T-Stat
- ASP UD Pulley (pinned)
- DeWitts Aluminum Radiator w/oil cooler
- 3 quart Accusump
- 42# matched injectors
- MTI Coil Packs (bling)
- Z06 Power Steering Cooler
- A-Pillar Gages
Rick at Synergy brought it all together with the dyno tuning.
Minor challenges were:
- Flycutting pistons
- dropping the cradle to remove the oil pan (made my own cable hanger setup for $20)
- tuning for idle - it wanted to surge and hunt
- melted my O2 sensor wires twice - it gets much hotter down there (will route them up through the tunnel plate)
- my BB Bullets are twice as loud now - I need to get something a little quieter before I get a fix-it ticket
Cheers,
John
Last edited by Cscokd; 03-21-2007 at 03:30 AM. Reason: Is AFR 8019 springs not 8017 springs
03-20-2007, 03:38 AM
#2
Drifting
Damn nice numbers for stock cubes and heads/cam/lts! congrats
what was your final compression ratio?
were the 42#ers really necessary?
What is the duty cycle on them now?
Standard dyno tune or speed density tune?
Did tony port the TB and intake, or just the TB?
Tony does intake/tb porting? didn't know that!
show ip bgp sum?
what was your final compression ratio?
were the 42#ers really necessary?
What is the duty cycle on them now?
Standard dyno tune or speed density tune?
Did tony port the TB and intake, or just the TB?
Tony does intake/tb porting? didn't know that!
show ip bgp sum?
03-20-2007, 04:01 AM
#3
Drifting
Thread Starter
Originally Posted by IFLUBYU
Damn nice numbers for stock cubes and heads/cam/lts! congrats
what was your final compression ratio?
what was your final compression ratio?
Originally Posted by IFLUBYU
were the 42#ers really necessary?
Originally Posted by IFLUBYU
What is the duty cycle on them now?
Originally Posted by IFLUBYU
Standard dyno tune or speed density tune??
Originally Posted by IFLUBYU
Did tony port the TB and intake, or just the TB?
Tony does intake/tb porting? didn't know that!
show ip bgp sum? what's this?
Cheers,
John
03-20-2007, 05:41 AM
#5
Team Owner
I think those are fantastic numbers for the 205's and 346 cu in 
I have one of Tony's FAST intakes I am setting up right now for installation. Just got my injectors back from cleaning and flow testing yesterday.
I have one of Tony's FAST intakes I am setting up right now for installation. Just got my injectors back from cleaning and flow testing yesterday.
03-20-2007, 02:18 PM
#11
Safety Car
I'll post up my dyno results as soon as I get a soft copy from Rick. My goal was 500 rwhp, so I didn't quite get there with 488 rwhp, but for a 346ci NA motor, these are some pretty good numbers. Tony pulled 521 rwhp with a similar motor, but I think he put in some secret cam sauce along with forged pistons and rods. Was it stroked Tony?
Cheers,
John
Cheers,
John
03-20-2007, 02:35 PM
#14
Team Owner
Nice numbers...I highly recommend the Corsa touring exhaust to quiet things down. I am very happy with it. Z06 TI's would also be a good choice if you can get ahold of a set.
Chris
Chris
03-20-2007, 04:53 PM
#16
Former Vendor
Actually I think John may be getting some of the numbers confused and I believe the car he is referring to made 510/441 on the same brand (Dyno-Pack) dyno here in LA about a month ago. That was my buddy Dennis's car with all the bells and whistles and definitely a slightly larger cam with different rocker arms as well. Here is the link to those results which were very impressive btw....especially at the upper portion of the curve.
http://forums.corvetteforum.com/show....php?t=1627587
John....I bet the same rocker arms and a little more cam and we could comfortably crack the 500 mark.
Regarding my 383 it actually made 537/491 on Ricks dyno the day before he had his "BBQ". I have the gragh somewhere....ask Rick about the spirited ride I took him on.....LOL
Congrats on the numbers John....thats a pretty stout 346 you have there.
http://forums.corvetteforum.com/show....php?t=1627587
John....I bet the same rocker arms and a little more cam and we could comfortably crack the 500 mark.
Regarding my 383 it actually made 537/491 on Ricks dyno the day before he had his "BBQ". I have the gragh somewhere....ask Rick about the spirited ride I took him on.....LOL
Congrats on the numbers John....thats a pretty stout 346 you have there.
03-20-2007, 07:32 PM
#18
Team Owner
Any guesses to the hp increase yielded from the Yella Terra ultralights? Curious as most seem to put down the aftermarket rockers but I like the Cranes I am running.
03-20-2007, 07:48 PM
#19
Team Owner
Member Since: Sep 2003
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I am a bit confused here:
Dyno chart to be posted plz?
AFR 205's (346 CID) 488 RWHP / 453 RWTQ !!
Thought I should post up now that my dyno tuning is done. I started out with a stock '98 C5 with VariRam CAI, LGLT headers/high flow CATs that dyno'd at 331 rwhp and 354 torque.
Thought I should post up now that my dyno tuning is done. I started out with a stock '98 C5 with VariRam CAI, LGLT headers/high flow CATs that dyno'd at 331 rwhp and 354 torque.
03-20-2007, 08:13 PM
#20
Drifting
Thread Starter