Dyno sheet
I would highly recommend you upgrade the injectors as soon as you can. You especially need them before you spray. If the A/F gets between 12-13 your power will increase, and probably a good bit depending on timing/knock retard.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Just from what I can see;
For increased NA power:
1- Bigger injectors 42lbs recomended
2- Port TB
3 Tune correctly
For juice:
4- Tune right AFR, use window box for nitrous
5- TR6 or 1 step colder plugs for N2O (reduce gap to .035>.040 range)
6- Wideband O2 kit for AFR monitoring
For increased NA power:
1- Bigger injectors 42lbs recomended
2- Port TB
3 Tune correctly
For juice:
4- Tune right AFR, use window box for nitrous
5- TR6 or 1 step colder plugs for N2O (reduce gap to .035>.040 range)
6- Wideband O2 kit for AFR monitoring
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
My 370 is optimized at 12.6 peak rpm and 13.2 peak trq no knock.
AFR should never be linear in a combo at WOT if tuned correctly.
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Ok, I gotta bite on this because despite your jacked up LEAN A/F your dyno sheeet shows some serious power. Who did you get the cam and heads from and what was your budget on the project (ballpark is cool)?
You NEED NEED NEED to fix that A/F before you spray that motor or else you're going to be searching for piston parts in your oil pan...
You NEED NEED NEED to fix that A/F before you spray that motor or else you're going to be searching for piston parts in your oil pan...
I called the tuner today and he said the sensor was at the tail pipe and the cats were causing the reading to show high and the actual F/A was 13.1 to 13.5. I will get the injectors and ported throttle body and take it back in about two weeks and do a dyno on motor and n2o for you guys. If I didnt mention before it is a NX wet kit. I hope this will help out from 3 to 4K but on motor after 4k it is scarry. Thanks a lot for all the replies.
Ok, I gotta bite on this because despite your jacked up LEAN A/F your dyno sheeet shows some serious power. Who did you get the cam and heads from and what was your budget on the project (ballpark is cool)?
You NEED NEED NEED to fix that A/F before you spray that motor or else you're going to be searching for piston parts in your oil pan...
You NEED NEED NEED to fix that A/F before you spray that motor or else you're going to be searching for piston parts in your oil pan...
H/C, pushrods, gaskets, 1900 Optional LS2 timing chain, LS6 pump, ARP bolts,
Racetronic FP w/hw kit 650
Wideband tune 350
Labor was me but RPM in St Louis charges $1100 for H/C swap.
They charged $350 for fuel pump and hot wire install.
$500 for gears,TA cover and clutch including turning the flywheel.
$100 for dyno runs.
From tuner "I guess you talked to tim about the A/F ratio. It will always show leaner at the tailpipe rather than what it really is, you have cats, and you tune is not just a dyno tune. The A/F ratio will show leaner on a dyno roller and richer on the street because the roller doesnt weigh as much as your car does, so it will run leaner on the rollers."
Last edited by jcolews6; Feb 23, 2008 at 10:50 AM. Reason: ed
