New dyno numbers

[Rootus]

310 rwhp, 336 rwtq

My previous run was 279 rwhp, 315 rwtq. Changes between then and now:

1. Change MAC cat-back to Magnaflow
2. Swap 65mm 94/95 throttle body for 75mm Fox TB
3. Swap 75mm MAF for 80mm MAF
4. Added 88* injector timing
5. Leaned fuel mixture about half a point
6. Added 4* of timing at 5000+

The first run today was 299/335, adjustments #5 & #6 from above netted a 14 rwhp gain. I don't really know how much switching to the Fox stuff helped, the biggest SOTP change before today was the 88* of injector timing.

I don't think I'll see a lot more from this engine naturally aspirated. It's blowing a noticable pall of blue smoke on the dyno, so I think it's getting a bit loose. I bet I could see 20 rwhp by re-ringing it. And I think I still have 5 more rwhp or so in the tune, we didn't try all that hard to get every last bit.

Dave

 

[Rootus]

BTW -- notice where it's breaking up around 5700 or so? It was doing that from about 5000 up before we fixed the timing. I bet I could get a little more torque under that curve if I adjusted the EEC to give me another degree or so of timing at 5700+. The table stops at 5000, and I didn't take the time to re-do the RPM scale so I could adjust at the highest RPM. Someday .

Dave

 

[baglock1]

Damn Dave, nice gains considering the mods!

 

[SuperDust22]

very nice numbers. How does the car feel now. I would like to see some new track times.

Dustin

 

[final5-0]

Nice numbers Dave!

These numbers look more like what your combo should put down.

Later
Grady

 

[Rootus]

very nice numbers. How does the car feel now. I would like to see some new track times.

It's feeling happy, but it's not a night & day difference. I'm hoping to squeeze out a couple more mph at the track. My ultimate goal is 110 mph and 12.x ET's. That'll be in the spring though, we're running out of time this year and I'm running out of money.

Nice numbers Dave!

These numbers look more like what your combo should put down.

Thanks for the kind words. This finally fulfills my original goal for the motor in N/A trim, so I'm ready to start spending some quality time on the suspension. I've got my first goodies for the front end, and sometime in the next month or so I want to do some things to the rear end as well. Nothing on the scale of baglock1, but I'd like to feel enough confidence in the car to take it around PIR (the whole track, not just the 1/4 mile on the front straightaway ).

Dave

 

[Killercanary]

AWESOME NUMBERS DAVE!!! I'm really glad to see your combo finally making the numbers that it should. I have to mess with this injector timing stuff now... well, when I get back from Europe. The temps will be falling soon as fall is coming... go get some new times!!!

 

[Joes95GT]

Damn Dave, you musta' paid the dyno guy off, huh?

Those are really nice numbers. The torque is really nice. Good job tuning the thing.

Joe

 

[VibrantRedGT]

I guessed over 300HP and that's a huge improvement over 279HP from exhaust/TB. Congrats!

 

[Rootus]

Damn Dave, you musta' paid the dyno guy off, huh?

Shhhh, you're not supposed to tell...

Those are really nice numbers. The torque is really nice. Good job tuning the thing.

I'm happy with the way it's running now. Credit for the tuning really goes to a friend of mine (Visceral on SN), he's the one with a clue. Too bad he's an LS1 lover at heart... (his 93 SSP notch put down about 250 rwhp today, not bad at all for bolt-ons).

Dave

 

[94DreamGT]

Nice numbers Dave.

I seem to recall when you first did this H/C/I you put down like 306rwhp or somewhere around that. Then you redid it and got 279rwhp??? Refresh my memory if you will on all that. 279rwhp was way too low for your combo no matter what.

As for your dyno chart, I'd have to say its almost identical to mine...see below. The fact that you have 6 more rwhp and 5 more rwtq is probably the difference from my stock Cobra intake to the Performer. My tune is stock and my throttle body is a little different, but I don't see any other major differences in our combo that would suggest otherwise.

Here is mine:

 

[Rootus]

I seem to recall when you first did this H/C/I you put down like 306rwhp or somewhere around that. Then you redid it and got 279rwhp???

My very first dyno numbers were 309 rwhp, on an AWD Mustang dyno. Because I was only trapping at 104-105, I suspected something was not right with those numbers, so I went to a Dynojet (I wanted to be able to sorta compare results with other people, and everyone here uses Dynojet). My first run on the Dynojet was 273 rwhp. 279 came during a dyno day (on a different Dynojet) with no real tweaks to the car.

As for your dyno chart, I'd have to say its almost identical to mine...see below.

You're right, they're nearly identical for sure. Maybe we have the exact same FTI cam .

I'm really not sure which of the things I did corrected the problem. Ideally I would have done dyno runs in between individual changes, but that gets a bit expensive . I'm just glad to have it sorted out... even if Jake still makes 15 more at the wheels .

Dave

 

[Rootus]

Oh yeah, one other thing -- when I was heading to the dyno today I had 225 miles and still a quarter tank of gas. Normally I get 225 to the entire tank. If it hadn't been for the dyno runs I might have cleared 20 mpg for the first time since the H/C/I swap. As it is I ended up with 17 . Dyno runs are not fuel efficient, we ran it about 25 times and sucked down all of that quarter tank of gas. I think the change in mpg is entirely due to fixing the injector timing.

Dave

 

[94TURBO5 O]

Nice #'s Dave

 

[Grn92LX]

Nice #'s. Your car starts going a bit lean after 5k. Might want to richen that up a touch. I bet you can gain a few ponys as well from that. Did you port match the inlet for that 75mm TB? I gotta get me a 75mm so bad!! I think I could see 5-8hp gain with a 75mm on mine. Your graph looks like mine. So you gained 20hp from an maf, tb and injector timing? Nice!

 

[Rootus]

We ran out of time with the A/F -- at first the EEC was playing games with us, we'd make a tiny adjustment and the entire curve would jump a half a point or more. Come to find out that the changes to the TwEECer weren't taking correctly. By the time we figured out what the hell was throwing us off, we were getting low on time and patience. And since the dyno isn't the most accurate place to dial in A/F anyway (due to the low load), I'm just going to use it as an excuse to get a wideband .

I still have several things on my list to do, one of them is port the inlet to match the throttle body. I also want to get myself an extra Edelbrock lower so I can send it off to tmoss for porting. Oh wait, I think I said engine mods were done with for a while. Oops.

Dave

 

[igotyofire]

have u ever done a roll on with a ls1? just curious on how much whp it takes to beat a ls1 F body

 

[94DreamGT]

have u ever done a roll on with a ls1? just curious on how much whp it takes to beat a ls1 F body

You need to define what kind of LS1.

Stock with maybe only a Lid and/or Cat-back...I can pull them hard from any roll, 1st...2nd...3rd...even 4th.

Bolt-on LS1...depends on what bolt-ons and how strong of a runner it is. Some LS1's are just freaks and respond extraordinarily well to mods. Lid, Exhaust (LT's), Gears, etc...could be close. I've inched some and been beaten.

Modded LS1...forget about it.

I'm sure Dave will agree.

 

[Rootus]

I'm sure Dave will agree.

Yes, 100%.

I have only come up against maybe 10 LS1 F-bodies at the track, and I actually beat them all . Even with only 279 rwhp. Fact is, driver plays a large part of the equation, and while I'm not a good driver, I've only run up against drivers who were even worse .

To run with a well-modded LS1 (stock cubes) would take an optimally built & tuned 347 IMHO. And even then there's no guarantee -- a heads/cam LS1 can put down 440 to the wheels. For something with only 346 cubes, it's an awesome engine. Hard to make 60's technology stay with it .

Dave

 

[Sleepy McNastee]

A little late on my part but nice numbers dude.

Now go try to find that integra that was bothering you.