Low hp after afr 205 install
08-01-2006, 01:56 PM
#1
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Low hp after afr 205 install Car dynoed 329hp before heads and cam and 369hp after afr205's ,237/242 595/595 112 cam. fast90. The car is auto 4000 yank hooker LT's and cut out
Had the same set up in another car less fast intake and Tb that one dynoed 412hp
Any idea what could be wrong
Had the same set up in another car less fast intake and Tb that one dynoed 412hp
Any idea what could be wrong
08-01-2006, 03:28 PM
#2
Lots of unknown variables. First, was the converter clutch locked up? Was the cam degreed in or installed dot to dot? What is the inake centerline? What was the static compression? Heads milled? Head gasket size? Is it tuned? What's the A/F ratio look like? How much timing? Any knock retard? Got a dyno graph? You're leaving out too much infomation for any of us to give you much help. Answer those questions and provide a graph (huge help) and we will try to diagnose where you lost power is.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
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2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
08-01-2006, 07:59 PM
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Originally Posted by Slowhawk
Sounds like an unlocked converter.We had a car pull 370rwhp unlocked and 450rwhp locked.Sound the same.
08-01-2006, 08:15 PM
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Originally Posted by raddog1985
Car dynoed 329hp before heads and cam and 369hp after afr205's ,237/242 595/595 112 cam. fast90. The car is auto 4000 yank hooker LT's and cut out
Had the same set up in another car less fast intake and Tb that one dynoed 412hp
Any idea what could be wrong
Had the same set up in another car less fast intake and Tb that one dynoed 412hp
Any idea what could be wrong
What transmission?
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08-02-2006, 04:10 AM
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Originally Posted by Houston999
how do you lock the converter on the dyno?
I thought the converter locked at it's stall rating (+/- rpm) ??
08-02-2006, 06:54 AM
#10
Originally Posted by DrkPhx
Wow, that's a big difference. I still think 369 rwhp unlocked is low. My old setup was PP S2 heads, 232/232 cam and TCI 3800 dyno'd 377 rwhp unlocked and 394 rwhp locked. I was pissed because that seemed too low.
Unlocked Nitrous- 450hp/460tq
Locked -620hp/680tq
Dyno #'s are just dyno #'s. Some converter's dyno better than other's.They are made to make your car fast,not dyno high.
08-02-2006, 10:52 AM
#12
Chassis dyno numbers thru an auto transmission (with a performance converter) is like a box of chocolates.....you guys know the rest.....LOL
ALot of people hit on some very good info to consider concerning your situation....feel free to contact me at AFR directly if you feel the need.
(818)890-0616 Ext. 109
Regards,
Tony
ALot of people hit on some very good info to consider concerning your situation....feel free to contact me at AFR directly if you feel the need.
(818)890-0616 Ext. 109
Regards,
Tony
Last edited by Tony Mamo @ AFR; 08-03-2006 at 07:22 PM.
08-02-2006, 11:40 AM
#15
Originally Posted by beardWS6
Dyno Queens can be Kings at the track!
08-02-2006, 03:31 PM
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cam is dot to dot
static compression is 10.5
heads are not milled 66 cc's
stock gasket
a/f ratio 13.1
total timing is 29 at 369hp
total timing is 27 at 362hp
no knock retard
cam intake centerline 108
and the converter was not locked up
we used the same dyno before and after the install
and it's the same dyno another car with the same set up less fast intake
but a 2800 stall converter did 413hp
thanks for all the help
static compression is 10.5
heads are not milled 66 cc's
stock gasket
a/f ratio 13.1
total timing is 29 at 369hp
total timing is 27 at 362hp
no knock retard
cam intake centerline 108
and the converter was not locked up
we used the same dyno before and after the install
and it's the same dyno another car with the same set up less fast intake
but a 2800 stall converter did 413hp
thanks for all the help
08-02-2006, 03:35 PM
#19
Originally Posted by raddog1985
cam is dot to dot
static compression is 10.5
heads are not milled 66 cc's
stock gasket
a/f ratio 13.1
total timing is 29 at 369hp
total timing is 27 at 362hp
no knock retard
cam intake centerline 108
and the converter was not locked up
we used the same dyno before and after the install
and it's the same dyno another car with the same set up less fast intake
but a 2800 stall converter did 413hp
thanks for all the help
static compression is 10.5
heads are not milled 66 cc's
stock gasket
a/f ratio 13.1
total timing is 29 at 369hp
total timing is 27 at 362hp
no knock retard
cam intake centerline 108
and the converter was not locked up
we used the same dyno before and after the install
and it's the same dyno another car with the same set up less fast intake
but a 2800 stall converter did 413hp
thanks for all the help
08-02-2006, 03:36 PM
#20
na those numbers are low.. i have a very similar setup and i just did 430 unlocked so either your converter is eating up like 60 more hp than my similar sized tci converter or you got a problem
Originally Posted by BlueSix
With an unlocked big stall i wouldn't expect a whole lot more. Take it to the track and have fun.