Whipple Boost.. How much gain from 17-19 psi?

[XSIV_BOOST]

I'm thinking about adding either a 2 lb. lower to go with my 3.0 upper on my whipple, or something like a 3.5 upper, and 4 lb. lower. I have the gen II, and with my elevation, and my headers, I make like 17.1 pounds of boost on a hot day with just the 3.0. How much do you all believe I would pick up by adding a 2 lb lower, or going 4llb. & a 3.5 upper?.. That should bring me to around 19 psi. It makes 598rwhp & 545rwtq on 18 degrees of timing right now. Also, how much would a race tune on 109, with more aggressive timing help at 17, and at 19?

 

[Fat-cat]

Should put you in the 610 -620 area Hp wise i would think

 

[jsucil89]

I'm thinking about adding either a 2 lb. lower to go with my 3.0 upper on my whipple, or something like a 3.5 upper, and 4 lb. lower. I have the gen II, and with my elevation, and my headers, I make like 17.1 pounds of boost on a hot day with just the 3.0. How much do you all believe I would pick up by adding a 2 lb lower, or going 4llb. & a 3.5 upper?.. That should bring me to around 19 psi. It makes 598rwhp & 545rwtq on 18 degrees of timing right now. Also, how much would a race tune on 109, with more aggressive timing help at 17, and at 19?

What elevation and what type of fuel are you running to make 598 rwhp?

 

[XSIV_BOOST]

What elevation and what type of fuel are you running to make 598 rwhp?

I'm not sure what the elevation is around here, but i'm in Eastern Kentucky. I'm running 93..

 

[91svtcoupe]

Well this is what I have been looking into for a few weeks.

My Tuner thinks I can make close to 650 with a 2lb lower and 3.5 upper. On a Gen 2 Whipple 2.3 with street tune..93 Oct. Here in NC with longtube headers.

I don't want to spend the money on a lower ($400)..So I want to do just a 3.0 RR upper. He says I will miss out on TQ.

 

[RussZTT]

On average you gain between 11-14rwhp for every 1psi.

 

[XSIV_BOOST]

wonder how the torque numbers would vary from the 2lb lower/3.0 upper and the 4lb lower/3.5 upper combo

 

[SVT03Chris]

Well this is what I have been looking into for a few weeks.

My Tuner thinks I can make close to 650 with a 2lb lower and 3.5 upper. On a Gen 2 Whipple 2.3 with street tune..93 Oct. Here in NC with longtube headers.

NO WAY!!! You will not make anywhere close to 650RWHP with a 3.5 / 2lb setup on 93 Octane with a street tune which means fairly conservative. I can't even see you hitting that with Race gas, race tune, aggressive timing, etc. You need to UP that boost to like 22psi or so and mix that with race gas, aggressive timing, etc to see those kind of numbers. Even then you will be pushing it and not guaranteed 650RWHP

 

[supercarkiller]

^ great info ! i have a 4lb lower now with a whipple(coming soon) what size upper pulley should i use for most boost with 93 octane ?

 

[03 KYL]

I don't think you'll see 19lbs with the 3.5/4lb combo. That is what I used to run and made 17.5 lbs. I had a Gen 2 Whipple with Mac longtubes btw.

 

[XSIV_BOOST]

I don't think you'll see 19lbs with the 3.5/4lb combo. That is what I used to run and made 17.5 lbs. I had a Gen 2 Whipple with Mac longtubes btw.

well maybe a 3.25 upper with 4 pound lower. Or even a 3.5 upper with a 6 lb. lower.. do changing the size of the lower really affect torque numbers that much?

 

[VADEi2]

I'm in cali and can only run 91 and was thinking of 4lb lower with 3.5 upper I was looking in achieving 600rwhp but looks like I will have to move to another state or run a fuel additive.

 

[blackvenom77]

It depends on the timing and how aggressive you want the tune to be.

 

[srl135]

I am in no way a go-to guy for this info but the whipple im putting on came off of a car that ran 3.25" upper/6# lower and put down 638/611 (according to the dynojet chart). I believe it was not a wild tune, but I cant speak on the parameters though...

I am really interested in learning about the combo setups. Right now im having the whipple put on with a 3.25" upper/stock lower. I want to see what power/tq i put down on that setup before adding a lower and/or changing upper.

 

[Tom's_03SVT]

I made 624/608 w/ 19#, 19*, and stock manifolds on 100 octane with a Gen I here in Memphis.

 

[supercarkiller]

dayuuum nice man !

 

[RoadRash]

My whipple genII made 643/598 @ 21psi, 22* timing, 11.5 a/f with a 3" pulley (stock lower, stock manifolds). This was with 96 octane (93 + torco). Tuned by HBH.

Billy - get that whipple man!!

 

[XSIV_BOOST]

My whipple genII made 643/598 @ 21psi, 22* timing, 11.5 a/f with a 3" pulley (stock lower, stock manifolds). This was with 96 octane (93 + torco). Tuned by HBH.

Billy - get that whipple man!!

dayyyyum.. 22* timing on 96 octane?? And 21 psi??? Are you on stock bottom end?

 

[RoadRash]

dayyyyum.. 22* timing on 96 octane?? And 21 psi??? Are you on stock bottom end?

I say 96 octane but it was 93 plus a couple of bottles of Torco. That was tuned at 11.5 a/f ruler straight. Hermann is the man!

That was the balls out tune .. My Daily driver tune is 19.5* timing, 18psi, 3.2" RR pulley, 93 octane.

So far 15,000 miles and running strong! FTW!

[edit] Yes, Stock bottom end.

 

[03cobradroptop]

NO WAY!!! You will not make anywhere close to 650RWHP with a 3.5 / 2lb setup on 93 Octane with a street tune which means fairly conservative. I can't even see you hitting that with Race gas, race tune, aggressive timing, etc. You need to UP that boost to like 22psi or so and mix that with race gas, aggressive timing, etc to see those kind of numbers. Even then you will be pushing it and not guaranteed 650RWHP

im in michigan 17lbs here on 93 gen 1 whipple kooks long tubes stock fuel system exept the 60# inj. make 638 rwhp 590rwtq. very safe tune also :banana: