I finally got my car on the dyno last week.
I have a 94 lt1 with home ported heads
numbers intake exhaust
.050 30 22
.100 63 53
.200 127 105
.300 182 126
.400 227 145
.500 254 162
.600 239 170
I am also running a hot cam with1.6 promagnum rr's ,slp 1 3/4" headers amd a flowmaster catback. Ed Wright tuning, adjustible fpr. car is an a4 with 373 gears and stock stall
Dyno numbers
rpm power torque air/fuel
3600 192.3 280.6 13.0
3700 199.9 283.8 13.0
3800 206.5 285.4 12.9
3900 211.7 285.1 12.8
4000 221.1 290.3 12.7
4100 228.3 292.4 12.6
4200 234.9 293.8 12.6
4300 242.2 295.9 12.5
4400 247.3 295.2 12.4
4500 255.9 298.6* 12.4
4600 260.1 296.9 12.3
4700 264.6 295.7 12.2
4800 269.5 294.9 12.1
4900 275.2 295.0 12.1
5000 280.5 294.6 12.0
5100 285.2 293.7 11.9
5200 290.2 293.1 11.8
5300 296.7 294.0 11.8
5400 301.3 293.0 11.7
5500 305.2 291.5 11.8
5600 309.4 290.2 11.7
5700 313.6 288.9 11.8
5800 316.2 286.4 11.8
5900 319.4 284.3 11.8
6000 322.0 281.9 11.9
6100 322.6 277.8 11.9
6200 327.9* 277.8 12.0

My question is my torque seems low to me. Will a dyno tune likely help me gain 15-20 lbft of torque and some hp? Or do you guys think that my heads are the limiting factor(my exhaust flow needs more work). I was shooting for 350 rwhp and torque in that neighborhood.
On my first pull my car was running way rich it pegged the a/f meter at 10 all the way across the board. We adjusted my fpr from 44psi to 39psi and got 12 hp and 12lbft of torque.
Is this a tuning issue or do I need better heads?
Thanks for your comments. Sorry about the length of the post.
Kory

 

I'm a bit confused about your question. It seems like you already had it on the dyno?

Rich Krause

 

Yes
it was already on the dyno. It presently has a ed wright mail order tune. Would a full on dyno tune help out?Also what correction factor does everyone use. They used sae correction on mine.
Kory

 

I agree with you, the TQ does seem a bit low. I mean I dynoed 303rwtq on the stock cam & heads (i have a 6speed tho).

I'm sure leaning it out would help a bit, you're still pretty rich above 4500 for an NA motor.

I would expect a little more HP too, but it was still rising at 6200 when it shut down so maybe there's alittle more there.

 

It was taken to 6400. 6200 was the best hp. I didn't show the rest of the graff because I already used up alot of space.
I guess my question is do I spend 400 on a dyno tune now or do some better heads first? Is it likely that I can make 20 more hp and as much torque?
Thanks for the replys.
Kory

 

I have stock heads and cam, and have more tq than you too.

When you ported your heads did you mess with the chamber size? The hotcam with stock, or slightly better than stock compression will yield more tq than the stock cam, maybe you in-advertantly dropped your compression a bit.

and fix up that exhaust flow!

 

The compression came out to 10.55to1 I am running thinner head gaskets. I think that my exhaust runner flow is what is killing me.
Kory

 

It is rich, as others have said. I think it would be worth your while to lean it out. Most NA cars make best power in the 13:1 range, but you will need to experiment (ie "tune"). Many mailk ordertunes also have too much timing. It's worth playing with that as well.

Rich Krause

 

I really appreciate the replys. I think that a dyno tune is in order.
One last question. Does anyone have any idea how much torque I should be making.
Thanks alot.
Kory