Back from the dyno again lol.

[Jivepepper]

Well it made pretty good power but we had to back out the timing because I was running out of fuel. He said once I find the problem he could probably get 620-630 out of it.

The only thing that bothers me is the drivabilty is still crappy maybe even a little worse. Anything between 2-3k and about a 1/4-1/2 of a pedal it farts and misses. If I floor it, or get past 3k or under 2k it's fine. My fuel system should be good to about 650 but for some reason it not holding up.

He thinks it might be an internal leak in the tank. , I'll save some money find out what is causing my miss and return. I also noticed on the way up that my speedometer fluctuates a little ever so often, who knows? I'm glad it's making decent power. Even though I had to leave a little on the table. But the drive ability is really bumming me out. He data logged everything possible did lots of part throttle runs but nothing shows up? But as soon as I get in real world conditions it starts it's crap.

Well here's the numbers. 598.5HP and 531.4TQ. Not bad for a little Vortech V1 S-trim. So I guess the patriot heads make power after all. He asked me if I wanted to put 1 more degree of timing in it and try for 600 but I didn't want to push my luck with the questionable fuel system. I'll get it next time.

[MBH]

wtf lol, those are some sick numbers!

[PunisherStang]

awesome numbers

[Rodeheaver's]

Nice!!

[SonofaBish]

You also could get some more power by leaning it out a bit.... With a supercharged application, you don't need it to be near that rich in places.... you're down at 10:1 at 4200 rpms, gradually work up to 11.0:1 and then back down to 10:1 at 5900.... With forced induction, there is a lot of power left in it by just leaning it out a little bit....

For example, my car was sitting at 695/702 rwhp/rwtq with 11.0:1 a/f and 12* of timing.... (most run about 11.5:1 and 17*, but i wanted good and conservative)... just for shits and giggles, knowing it was safe, we fooled around with it a bit... adding just a few degrees of timing sent the hp up over 720/720.... we pulled the timing back out and leaned out just a little bit of fuel to 11.5.... power went to over 740/740... All of these pulls at 13psi...
We pulled it all back out and my car currently sits still at 13psi, making 698/706 rwhp/rwtq... Turbo cars usually require a little more fuel than supercharged cars, so i'd say you could very safely lean that out a bit.... that'd get you your 600, if that was your goal.... my intention was always to do a TT car, so i'm not 100% sure, but if i recall, i thought supercharged cars could run pretty safely in the high 11's:1 or even 12.0:1 .. ?

Nice numbers though!

[393rag]

I love your Sig

[Jivepepper]

You also could get some more power by leaning it out a bit.... With a supercharged application, you don't need it to be near that rich in places.... you're down at 10:1 at 4200 rpms, gradually work up to 11.0:1 and then back down to 10:1 at 5900.... With forced induction, there is a lot of power left in it by just leaning it out a little bit....

For example, my car was sitting at 695/702 rwhp/rwtq with 11.0:1 a/f and 12* of timing.... (most run about 11.5:1 and 17*, but i wanted good and conservative)... just for shits and giggles, knowing it was safe, we fooled around with it a bit... adding just a few degrees of timing sent the hp up over 720/720.... we pulled the timing back out and leaned out just a little bit of fuel to 11.5.... power went to over 740/740... All of these pulls at 13psi...
We pulled it all back out and my car currently sits still at 13psi, making 698/706 rwhp/rwtq... Turbo cars usually require a little more fuel than supercharged cars, so i'd say you could very safely lean that out a bit.... that'd get you your 600, if that was your goal.... my intention was always to do a TT car, so i'm not 100% sure, but if i recall, i thought supercharged cars could run pretty safely in the high 11's:1 or even 12.0:1 .. ?

Nice numbers though!

Already with ya.

My other tuner would keep it 12 flat all the way across the graph. Don said I do not have enough fuel, yet it's running pig rich. I wish I could just get a wide band and tune this myself on road where it matters. I need to learn, but I really do not want to use my car as guinea pig.

I love your Sig

thanks

[no1sirbutler]

nice numbers jive

[TBone7281]

Awesome numbers! What's your setup other than the s/c?

[Jivepepper]

Awesome numbers! What's your setup other than the s/c?

V1 s-trim 3" pulley
AFM powerpipe
MMR mod 900 short block
Patriot stage 2 heads
Houston perf. S292 blower cams
Pro products 75mm tb and plenum
Ebay diy intercooler
8-rib pulley setup
18% IW overdrive crank pulley
full exhaust
stock intake
supporting mods.

[TBone7281]

V1 s-trim
MMR mod 900 short block
Patriot stage 2 heads
ebay diy intercooler
8-rib
overdrive crank pulley
full exhaust stock intake
supporting mods.

You MacGyver'ed an intercooler?

[Jivepepper]

You MacGyver'ed an intercooler?

Well I bought the cooler on ebay and a basic pipe kit. Then I just cut coupled it together.

[wick]

You MacGyver'ed an intercooler?

Whats wrong with that? Its alot cheaper and you can do it the way you want it to be done. Not the exact same thing everybody else has...

Nice numbers bud.

[somethingclever]

How many psi were you seeing?

[Jivepepper]

Whats wrong with that? Its alot cheaper and you can do it the way you want it to be done. Not the exact same thing everybody else has...

Nice numbers bud.

Thanks

How many psi were you seeing?

They said 17

[gmkillr]

Congrats! You will be going mid to low 10's without breakin a sweat now!
When's the next track outing for you?

[TBone7281]

Whats wrong with that? Its alot cheaper and you can do it the way you want it to be done. Not the exact same thing everybody else has...

Nothing, just when I saw "diy" I envisioned bubble gum, bubble wrap, and laundry dryer exhaust hoses.

[Jivepepper]

Congrats! You will be going mid to low 10's without breakin a sweat now!
When's the next track outing for you?

Thanks

Well even though I think it's pig rich he says the fuel system is inadequate so I'm a little weary of going. He also talked me into leaving the rev limiter at 6200. Plus the drivabilty issue makes it no fun. I tried to call him back 10 minutes later and he already left. We were renting another dyno.

[SonofaBish]

I'm sorry, I don't in any way want to call a professional wrong or call him out, but there's a lot of power left in the A/F ratios...

This may have been asked, but are you tuning it via MAF or SD? At that power level, i'd think you have to be reaching the edge of what the MAF can handle? I had no choice but to go with SD - the only problem is, though SD is great, it takes even longer to get dialed in - therefore its more expensive - mine still isn't perfect... and i think its a little more finicky with changes in temperature/humidity/etc, but not positive with that

[TBone7281]

I'm sorry, I don't in any way want to call a professional wrong or call him out, but there's a lot of power left in the A/F ratios...

This may have been asked, but are you tuning it via MAF or SD? At that power level, i'd think you have to be reaching the edge of what the MAF can handle? I had no choice but to go with SD - the only problem is, though SD is great, it takes even longer to get dialed in - therefore its more expensive - mine still isn't perfect... and i think its a little more finicky with changes in temperature/humidity/etc, but not positive with that

Maybe the tuner was basing his "running out of fuel" assumption on the size of the injectors/fuel pump and the duty cycle? The graph does look pretty rich though...