Single vs Dual Intercoolers
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
Single vs Dual Intercoolers
How much difference is there between the two? I have heard that singles are more efficient, how much rwhp difference is there? I have also heard that the dual units require more plumbing, how much does it increase the install complexity? Lastly, does ATI and Vortech offer both versions?
Keith
Keith
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Re: Single vs Dual Intercoolers (kromberg)
Take a look at this post for some data
http://forums.corvetteforum.com/zerothread?id=530499
Just to clarify, the #s in this post are based on two modifications to the ATI kit. The air filter was moved up front and the dual intercoolers were replaced with a single front mount.
There is another post out there about HP change, you will have to search.
http://forums.corvetteforum.com/zerothread?id=530499
Just to clarify, the #s in this post are based on two modifications to the ATI kit. The air filter was moved up front and the dual intercoolers were replaced with a single front mount.
There is another post out there about HP change, you will have to search.
Le Mans Master
Joined: Oct 2001
Posts: 5,577
Likes: 3
From: Southern Maryland Maryland
Re: Single vs Dual Intercoolers (ICULUKN-C5)
Single intercooler will yeild:
1) Higher cooling efficiency due to increased surface
2) less pressure drop across the core(more boost at the motor)
Phillip
1) Higher cooling efficiency due to increased surface
2) less pressure drop across the core(more boost at the motor)
Phillip
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
Re: Single vs Dual Intercoolers (Phil97SVT)
So does the single intercooler go infront of the radiator? Any 'special' modification needed to the radiator or an aftermarket one needed?
Keith
Keith
Instructor
Joined: May 2002
Posts: 168
Likes: 17
From: Wichita KS
Re: Single vs Dual Intercoolers (kromberg)
In front of the radiator right on top of the ac condesor. You need to modify the radiator mount not the actuall radiator itself. YOu have to cut the lower radiator support bar off the frame savers. Bend the frame savers closer together and weld it back on farther forward on the car so the radiator will lay down more. I know more when I finish next week.
[Modified by BrainDrain_dx, 12:28 PM 8/4/2003]
[Modified by BrainDrain_dx, 12:28 PM 8/4/2003]
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
Re: Single vs Dual Intercoolers (kromberg)
I did before/after dynotune with the only change being the A&A Single Intercooler(FMIC on dyno). I gained 42rwhp before it started missing at 6,000rpm (125mph). I believe I missed about another 20rwhp on the dynosheet because I didn't know about the miss until I started driving it. I fixed the miss with plugs and wires.
This is a photo of the HP/MPH, Baseline is 480, FMIC is 490, FMIC tuned is 522 (measured at the 125mph line).
This is a photo of the TQ/RPM, Baseline is 438, FMIC is 442, FMIC tuned is 472.
[Modified by blu00rdstr, 11:39 AM 8/4/2003]
This is a photo of the HP/MPH, Baseline is 480, FMIC is 490, FMIC tuned is 522 (measured at the 125mph line).
This is a photo of the TQ/RPM, Baseline is 438, FMIC is 442, FMIC tuned is 472.
[Modified by blu00rdstr, 11:39 AM 8/4/2003]
Drifting
Joined: Jan 2002
Posts: 1,731
Likes: 1
From: Bay Area CA
Re: Single vs Dual Intercoolers (blu00rdstr)
So the gain is actually from aggressive tuning is what it sounds like. The hp/tq pickup without tuning wasn't all that great. Looks like the A/F is much leaner after the FMIC.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
Re: Single vs Dual Intercoolers (Red C5)
So the gain is actually from aggressive tuning is what it sounds like. The hp/tq pickup without tuning wasn't all that great. Looks like the A/F is much leaner after the FMIC.
Le Mans Master
Joined: Oct 2001
Posts: 5,577
Likes: 3
From: Southern Maryland Maryland
Re: Single vs Dual Intercoolers (Red C5)
So the gain is actually from aggressive tuning is what it sounds like. The hp/tq pickup without tuning wasn't all that great. Looks like the A/F is much leaner after the FMIC.
Phillip :cheers:
Drifting
Joined: Jan 2002
Posts: 1,731
Likes: 1
From: Bay Area CA
Re: Single vs Dual Intercoolers (Phil97SVT)
So the gain is actually from aggressive tuning is what it sounds like. The hp/tq pickup without tuning wasn't all that great. Looks like the A/F is much leaner after the FMIC.
The car was richened up significantly. There is still a few ponies left on the table...when the intake charge is colder you can lead the spark more.
Phillip :cheers:
The car was richened up significantly. There is still a few ponies left on the table...when the intake charge is colder you can lead the spark more.
Phillip :cheers:
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
Re: Single vs Dual Intercoolers (Red C5)
From the hazy copies I have, it looks like 'before FMIC' was 12.5, and 'after FMIC' is about 13.3 or 13.5. Andy told me MMS had to lean it out a full point after the FMIC.
I found my invoice, MMS performed:
<li>Computer reprogram LS1
<li>Dyno Tuning first hour, inc wide band
<li>Dyno Tuning additional hour
<li>Computer retune LS1
<li>Dyno Tuning first hour, inc wide band
I found my invoice, MMS performed:
<li>Computer reprogram LS1
<li>Dyno Tuning first hour, inc wide band
<li>Dyno Tuning additional hour
<li>Computer retune LS1
<li>Dyno Tuning first hour, inc wide band
Drifting
Joined: Jan 2002
Posts: 1,731
Likes: 1
From: Bay Area CA
Re: Single vs Dual Intercoolers (blu00rdstr)
From the hazy copies I have, it looks like 'before FMIC' was 12.5, and 'after FMIC' is about 13.3 or 13.5. Andy told me MMS had to lean it out a full point after the FMIC.
Melting Slicks
Joined: Jun 2002
Posts: 3,060
Likes: 3
From: Dublin CA
Re: Single vs Dual Intercoolers (Red C5)
I would think that is too lean for a FI motor. I'm not as smart as most of the people around here. I thought I read that on a blown car, the most you would wnat is 12-5-12.8 :confused: :confused:
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Re: Single vs Dual Intercoolers (Red C5)
Well, unfortunately that motor is now literally blown. So I guess it may have been a little lean. There is no doubt that leaning it out produces more power, but the stock pistons and ringlands just can’t take it for long.
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
Re: Single vs Dual Intercoolers (kromberg)
Here is another question: Is the Vortech aftercooler as efficient as the ATI single intercooler? Also is the charge temp a bigger issue with cars that have a higher compression ratio?
Keith
Keith
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Re: Single vs Dual Intercoolers (kromberg)
Here is another question: Is the Vortech aftercooler as efficient as the ATI single intercooler?
Also is the charge temp a bigger issue with cars that have a higher compression ratio?
[Modified by QuickSilver2002, 7:19 PM 8/5/2003]
