Where to find 4.2 rwhp???
Re: Where to find 4.2 rwhp??? Get a cut-out. This should bump your HP to the 400 mark.
Or, you could go Rice and do the following
1) Remove air filter
2) Over-inflate your tires
3) Dyno with smaller tires
4) Go on a colder day
5) Find a different dyno
I'm sure you'll do the right thing though and get a cutout <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Or, you could go Rice and do the following
1) Remove air filter
2) Over-inflate your tires
3) Dyno with smaller tires
4) Go on a colder day
5) Find a different dyno
I'm sure you'll do the right thing though and get a cutout <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: Where to find 4.2 rwhp??? Hey lane that's pretty darn good thru cats!!!
I'd pick up a spare 98 TB and port and polish it and I'm sure you'll hit the number. I know of a few around town... Or you can pay someone to port it for you.
Maybe borrow a MAF T for a pull or two and run it -1 or -2 WOT for 13:1 AF on the dyno.
What air filter are you using?
Stock MAF?
I'd pick up a spare 98 TB and port and polish it and I'm sure you'll hit the number. I know of a few around town... Or you can pay someone to port it for you.
Maybe borrow a MAF T for a pull or two and run it -1 or -2 WOT for 13:1 AF on the dyno.
What air filter are you using?
Stock MAF?
Re: Where to find 4.2 rwhp??? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by NoGo:
<strong>3) Dyno with smaller tires
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Actually, you would want a lighter, taller tire. Shorter tires increase the gearing effect. Taller will cut down the gear some. Its well known that numerically smaller rear end gears make more HP on the dyno. Same effect that overinflating tires have. A lighter tire / wheel combo will be easier to turn, increasing your dyno numbers as well. Just a dyno trick, no real power gain.
<strong>3) Dyno with smaller tires
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Actually, you would want a lighter, taller tire. Shorter tires increase the gearing effect. Taller will cut down the gear some. Its well known that numerically smaller rear end gears make more HP on the dyno. Same effect that overinflating tires have. A lighter tire / wheel combo will be easier to turn, increasing your dyno numbers as well. Just a dyno trick, no real power gain.
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From: Chicago (Elgin), IL
Re: Where to find 4.2 rwhp??? Actually for riceiness, I could just add a few big stickers. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I thought about possibly removing the filter afterwords, but even beforehand, I didn't notice a difference. I do now have a K&N in.
I usually run higher pressure in the tires as is but I thought dyno's took into factor your tire size along with the gear ratio?
Colder temps? It was a pretty brisk 48-50 degrees out Saturday, so not much more optimal than that. Matter of fact, I'm thinking that may be partially responsible for the excellent numbers I got.
There are several dyno's around here that I've had it on and FLP's has consistently been the kindest to my car. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I thought about a cut-out, but in all honesty, the cat-back is is a straight pipe anyway. I may get the QTEC though. I want to keep my stealthiness when not "on it". <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
John, how much gain is it worth on TB's? I thought our TB's already flowed more than the Intake could handle? But was that for the LS1 intake?
MAF-T is another thought and yes, mine is a stock albeit descreened MAF.
I need to take a look at my A-Tap log tonight. I'm also curious if I had any KR when I was running lean.
I thought about possibly removing the filter afterwords, but even beforehand, I didn't notice a difference. I do now have a K&N in.
I usually run higher pressure in the tires as is but I thought dyno's took into factor your tire size along with the gear ratio?
Colder temps? It was a pretty brisk 48-50 degrees out Saturday, so not much more optimal than that. Matter of fact, I'm thinking that may be partially responsible for the excellent numbers I got.
There are several dyno's around here that I've had it on and FLP's has consistently been the kindest to my car. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I thought about a cut-out, but in all honesty, the cat-back is is a straight pipe anyway. I may get the QTEC though. I want to keep my stealthiness when not "on it". <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
John, how much gain is it worth on TB's? I thought our TB's already flowed more than the Intake could handle? But was that for the LS1 intake?
MAF-T is another thought and yes, mine is a stock albeit descreened MAF.
I need to take a look at my A-Tap log tonight. I'm also curious if I had any KR when I was running lean.
Re: Where to find 4.2 rwhp??? A ported throttel body can be worth ~5 to 8 RWHP and you should change the parameters on your CAT over temp since you still have CATs. I don't have CAT's and shut off the CAT over temp and picked up ~ 12 RWHP!
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From: Chicago (Elgin), IL
Where to find 4.2 rwhp??? Last Saturday we dyno'd at FLP and I had some great pulls.
My best was 395.8rwhp on my rather conservative setup (compared to some heads and cammed cars now) and all I need is at least 4.2rwhp to "officially" become a member of the 400rwhp club.
I know I'm running waaayyyy too lean from 2,800 - 5,500rpm. It's in the 14.0:1 - 13.0:1 range steadily dropping as the rpm's increase. After that at WOT throttle it's in the 12.9 - 12.5 range and at that same point (5,500rpm and up), I make my maximum HP (5,900 is where it makes the most). So A/F at this point in the curve isn't an issue.
I'm working on the tuning issue with Steve Cole, but that will only bring my torque back up in that affected range and not help maximum power.
So I'm thinking what else I can do here?!
Here's what I got;
-GTP heads/cam
-LS6 intake
-Grotoyhann headers/random tech cats/G-Hann Y-pipe
-ATR cat-back
-Direct-Flo lid
-Stock MAF
-Stock TB
-NGK TR6 plugs
-MSD 8.5mm wires
-ASP pullies
I've thought about doing a bigger TB since I now have the LS6 intake. I don't really want to touch the MAF for tuning issues and I've even contemplated putting 1.8 rockers in. But I really don't want to tear into that again (replaced them once already).
Anything I'm missing?
My best was 395.8rwhp on my rather conservative setup (compared to some heads and cammed cars now) and all I need is at least 4.2rwhp to "officially" become a member of the 400rwhp club.
I know I'm running waaayyyy too lean from 2,800 - 5,500rpm. It's in the 14.0:1 - 13.0:1 range steadily dropping as the rpm's increase. After that at WOT throttle it's in the 12.9 - 12.5 range and at that same point (5,500rpm and up), I make my maximum HP (5,900 is where it makes the most). So A/F at this point in the curve isn't an issue.
I'm working on the tuning issue with Steve Cole, but that will only bring my torque back up in that affected range and not help maximum power.
So I'm thinking what else I can do here?!
Here's what I got;
-GTP heads/cam
-LS6 intake
-Grotoyhann headers/random tech cats/G-Hann Y-pipe
-ATR cat-back
-Direct-Flo lid
-Stock MAF
-Stock TB
-NGK TR6 plugs
-MSD 8.5mm wires
-ASP pullies
I've thought about doing a bigger TB since I now have the LS6 intake. I don't really want to touch the MAF for tuning issues and I've even contemplated putting 1.8 rockers in. But I really don't want to tear into that again (replaced them once already).
Anything I'm missing?
TECH Fanatic
Joined: Nov 2001
Posts: 1,355
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From: Chicago (Elgin), IL
Re: Where to find 4.2 rwhp??? Well, due to popular demand, I'll be getting a ported TB. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> I don't know about turning off the cats though.
I spoke with Steve Cole at TTS today and he doesn't think I'm running as lean as the DynoJet sensor thinks I am. He doesn't think too highly of their sniffers. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
He suggested a few things but first things first is to look in my A-Tap logs. He also asked about what kind of fuel, when the last time I changed my filter was, and what my fuel pressure was. I used premium Amoco 93 octane, changed my filter about three months ago, and I think I'll get a fuel pressure gauge to see if perhaps my stock fuel pump isn't feeding me enough go-go juice.
I spoke with Steve Cole at TTS today and he doesn't think I'm running as lean as the DynoJet sensor thinks I am. He doesn't think too highly of their sniffers. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
He suggested a few things but first things first is to look in my A-Tap logs. He also asked about what kind of fuel, when the last time I changed my filter was, and what my fuel pressure was. I used premium Amoco 93 octane, changed my filter about three months ago, and I think I'll get a fuel pressure gauge to see if perhaps my stock fuel pump isn't feeding me enough go-go juice.
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Re: Where to find 4.2 rwhp??? I think you should do the ported tb thing for sure..shaner s2 or whatever..and why not try a pace vv maf..pretty cheap easy mod..both of the above are very easy to install mods..and if they don't work are your running synthetic in rear and engine..that might get you 4rwhp and then there is carbon fibre driveshaft and then I guess you can do rockers like you said.But think either of the first two mods should get you your 400rwhp.
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Verdad Gallardo TECH Fanatic
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From: Chicago (Elgin), IL
Re: Where to find 4.2 rwhp??? LIke I said, I'm going to do the ported TB. But with heads & cam car, I've been repeadtedly warned to stay away from a aftermarket MAF.
Installation isn't an issue, I've had everything on this car apart multiple times and the axles comes out next. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
A Carbon fiber D.S. is out due to sheer cost.
Installation isn't an issue, I've had everything on this car apart multiple times and the axles comes out next. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
A Carbon fiber D.S. is out due to sheer cost.
Re: Where to find 4.2 rwhp??? Speed Inc. sells a ported one locally.
Or port your own or see if any MFBA folks have one.
Just clean it up... It's worth 3-6rwhp to clean it up on a heads/ cam car.
Or port your own or see if any MFBA folks have one.
Just clean it up... It's worth 3-6rwhp to clean it up on a heads/ cam car.
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Re: Where to find 4.2 rwhp??? Actually, I'm on Tom's site right now ordering gauges so I'll look at ported TB's. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
I'd rather get another one already ported or a another stock unit as I don't want to mess with my stock one.
I'd rather get another one already ported or a another stock unit as I don't want to mess with my stock one.
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Joined: Nov 2001
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From: Chicago (Elgin), IL
Re: Where to find 4.2 rwhp??? No Problem. I'll scan it soon.
I also think I found my lost HP....I'm getting KR again! <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> I think it may be due to lack of fuel.
I'll get more detailed when I sit down and fully analyze A-Tap data.
I also think I found my lost HP....I'm getting KR again! <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> I think it may be due to lack of fuel.
I'll get more detailed when I sit down and fully analyze A-Tap data.
Re: Where to find 4.2 rwhp??? Definitelu invest in a spare TB and port it or buy a ported TB and you should easily reach 400rwhp with your heads and cam setup. BTW what are the specs of your cam.
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From: Chicago (Elgin), IL
Re: Where to find 4.2 rwhp??? I have a feeling fixing the 3.4 to 3.9 degrees of KR that I'm getting will put me over 400rwhp. Overall (Net) timing after this KR in one place was 18 degrees and 21 at another point.
I'll post those numbers when I get a chance.
I'll post those numbers when I get a chance.
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Re: Where to find 4.2 rwhp??? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by John B:
<strong>A ported throttel body can be worth ~5 to 8 RWHP and you should change the parameters on your CAT over temp since you still have CATs. I don't have CAT's and shut off the CAT over temp and picked up ~ 12 RWHP!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What's CAT over temp ? how do you turn it off?
Thanks
<strong>A ported throttel body can be worth ~5 to 8 RWHP and you should change the parameters on your CAT over temp since you still have CATs. I don't have CAT's and shut off the CAT over temp and picked up ~ 12 RWHP!</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What's CAT over temp ? how do you turn it off?
Thanks
Re: Where to find 4.2 rwhp??? Port your throttle body or buy one that is already ported.... like shaner or some of the other ones that sell on the boards. That should easily put you over the 400rwhp mark.
Re: Where to find 4.2 rwhp??? let us know how you make out trying to get rid of that KR. fix the air/fuel ratio for sure (richen it up in the mid range). the ported t/b will also get you at least 5hp. if you want more, you may want to get a different y pipe, or mod the one you have, by installing a y pipe with a true collector. i know that the g-hann y pipe is just two pipes hitting eachother at the cross section of the y pipe. get a FLOWMASTER collector in there and you will also gain about 5 hp.