10#'s intercooled versus 10#'s unintercooled
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10#'s intercooled versus 10#'s unintercooled Hi guys,
What are your guess on the RWHP differences between a vortech kit running 10#'s intercooled vs 10#'s unintercooled. (G-trim blower)
What pulley combo do you think you'd need to run 10#'s@6500rpm on a motor with heads and cam that flows around 300cfm at 9.5:1 compression. Ls6 intake and ported throttle body. Long tube headers (1 3/4) and six speed tranny
I was guessing about 30-40RWHP difference. Curious as to your thoughts
Would 550RWHP be possible non intercooled on pump gas?
Chris
What are your guess on the RWHP differences between a vortech kit running 10#'s intercooled vs 10#'s unintercooled. (G-trim blower)
What pulley combo do you think you'd need to run 10#'s@6500rpm on a motor with heads and cam that flows around 300cfm at 9.5:1 compression. Ls6 intake and ported throttle body. Long tube headers (1 3/4) and six speed tranny
I was guessing about 30-40RWHP difference. Curious as to your thoughts
Would 550RWHP be possible non intercooled on pump gas?
Chris
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Re: 10#'s intercooled versus 10#'s unintercooled I'm thinking more like 80+rwhp. 
I bet SJH will have a good idea since he runs a non intercooled Vortech setup.
I bet SJH will have a good idea since he runs a non intercooled Vortech setup.
Re: 10#'s intercooled versus 10#'s unintercooled I've been flamed for saying this before, but... If you figure 10 hp/psi for non-intercooled boost and 15 hp/psi for intercooled boost, you can usually get pretty close. I made 425 at Speedworks on their mustang dyno with my powerdyne at 6 psi, and when I took it off, I made 362. So for ten psi, I would say the difference between intercooled and not is about 50 rwhp.
-Geoff
-Geoff
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From: Downers Grove,IL
Re: 10#'s intercooled versus 10#'s unintercooled you should be able to make 20hp per lb of boost with a vortech non intercooled system using water/alky.
A 2.85" pulley should get you 10psi at 6500 with the above combo.
550rwhp means about 650 crank, maybe a little more for blower drive loss.
So you'll need about 67lbs/min of maf flow. Mine did it in cool weather with a 2.85" pulley at around 6500rpm.
A 2.5" pulley really wakes up the G-trim! But you better have a Mondo bypass valve.
I run a Mondo bypass PLUS a secondary blower inlet throttle to keep my little high revving G-trim alive with a 2.5" pulley.
Steve
A 2.85" pulley should get you 10psi at 6500 with the above combo.
550rwhp means about 650 crank, maybe a little more for blower drive loss.
So you'll need about 67lbs/min of maf flow. Mine did it in cool weather with a 2.85" pulley at around 6500rpm.
A 2.5" pulley really wakes up the G-trim! But you better have a Mondo bypass valve.
I run a Mondo bypass PLUS a secondary blower inlet throttle to keep my little high revving G-trim alive with a 2.5" pulley.
Steve
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Re: 10#'s intercooled versus 10#'s unintercooled Thanks for the info
What is the smallest pulley size I can get use without having to use the secondary blower inlet T-body?
Check your PM's
thanks!
Chris
What is the smallest pulley size I can get use without having to use the secondary blower inlet T-body?
Check your PM's
thanks!
Chris
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From: Downers Grove,IL
Re: 10#'s intercooled versus 10#'s unintercooled Chris,
the secondary throttle is not something I would consider necessary.
It works very well though.
I ran the 2.85" pulley with a stock bypass valve and never had any issues.
The 2.5" moves a LOT more air at lower rpms and makes a mondo or similar valve mandatory.
I replied to your PM. Did you get it?
the secondary throttle is not something I would consider necessary.
It works very well though.
I ran the 2.85" pulley with a stock bypass valve and never had any issues.
The 2.5" moves a LOT more air at lower rpms and makes a mondo or similar valve mandatory.
I replied to your PM. Did you get it?
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Re: 10#'s intercooled versus 10#'s unintercooled Chris I have a 3.12 blower pulley I am not using, my buddy might have a few different sizes too let me know what size you are looking for.
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From: Downers Grove,IL
Re: 10#'s intercooled versus 10#'s unintercooled If you want to max the G-trim out-
I would go with a 2.5" pulley from ASP.I picked up around 80hp from a 2.85" pulley.
Then you'll need a 48.5" 8 rib belt. #K080485 Gates green stripe fits perfectly with a relocated tensioner pivot hole.
You should see 10psi by 4500rpm unless your cam has to much overlap.
I'll say this though.
Going from a 2.85 to the 2.5 made all my old tuning garbage.
It was a drastic change, mainly from the big lowend boost increase.
Steve
I would go with a 2.5" pulley from ASP.I picked up around 80hp from a 2.85" pulley.
Then you'll need a 48.5" 8 rib belt. #K080485 Gates green stripe fits perfectly with a relocated tensioner pivot hole.
You should see 10psi by 4500rpm unless your cam has to much overlap.
I'll say this though.
Going from a 2.85 to the 2.5 made all my old tuning garbage.
It was a drastic change, mainly from the big lowend boost increase.
Steve
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Re: 10#'s intercooled versus 10#'s unintercooled awesome info thanks!! If I go with the Vortech I'll do the 2.5 from the start
What was the approx cost of the crank pulley (8 inch I think?) and the 2.5 ASP pulley?
thanks again!
What was the approx cost of the crank pulley (8 inch I think?) and the 2.5 ASP pulley?
thanks again!
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From: Downers Grove,IL
Re: 10#'s intercooled versus 10#'s unintercooled I am using the supplied spring tensioner from Vortech with the composite idler.It works fantastic.
The 8" 8 rib crank pulley came with the kit along with an ATI super damper.
I have never ever had any belt problems with the 2.85 or the 2.5 pulleys using gates green stripe belts.
No belt dust even.
The 2.5" pulley was like 60$ direct from ASP.
The only probelm I ever had was the crank pulley spinning and I cured that when I keyed the crank.
The 8" 8 rib crank pulley came with the kit along with an ATI super damper.
I have never ever had any belt problems with the 2.85 or the 2.5 pulleys using gates green stripe belts.
No belt dust even.
The 2.5" pulley was like 60$ direct from ASP.
The only probelm I ever had was the crank pulley spinning and I cured that when I keyed the crank.
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From: Deep in the seedy underworld of Koonerville
Re: 10#'s intercooled versus 10#'s unintercooled The only probelm I ever had was the crank pulley spinning and I cured that when I keyed the crank.
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From: Your Reality Check Bounced...
Re: 10#'s intercooled versus 10#'s unintercooled Chris..being from the boosted territory I can tell you this...NOTHING is better than a good intercooler on a boosted car, there is a night/day difference unless ur way down in the 4-5psi range...but at 10psi you will definatly feel a big difference. I was running a 14x10x2 intercooler on my turbo eclipse with a 20g then upgraded intercoolers to an Apexi core mesuring 24x12x3, and I picked up 3-5mph and 20hp w/just that change.
Intercool that bastage...especially w/the high compression.
Intercool that bastage...especially w/the high compression.
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From: Bellevue, Wa
Re: 10#'s intercooled versus 10#'s unintercooled Nothing??????
Don't know if I would say that.
Steve already has and I plan on proving you don't need no stinkin intercooler
water/alky injection is my "intercooler" of choice.
Don't know if I would say that.
Steve already has and I plan on proving you don't need no stinkin intercooler
water/alky injection is my "intercooler" of choice.
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From: Downers Grove,IL
Re: 10#'s intercooled versus 10#'s unintercooled
With a GRINDER, tell'em Steve.
well did a log today, 13.5psi boost at 6000rpm,60lbs/min maf flow by 5100rpm and flatlined 67.6lbs by 5950rpm.
My iat hovered around 108 degrees through the pull with no intercooler and water/alky. Ambient temps were around 60.
You be the judge. I would say that's not bad for no intercooler as I am out of my blowers best efficiency range.
9-10psi used to put me around 20' over ambient.
Taking it to the strip next week.
