ken louie

Just wanted to know if purchasing a more effeicent intercooler aka SFR, Lindsey, will it allow me to run more boost? Living in california with 91 oct. fuel it seems to me that most people recommended only running 15 pounds of boost. I know that the stock intercooler are pretty good up to 350 wrhp.

thanks ken

daniel951

u can use the stock intercooler past 350 but it will become a restrictive point once u keep moving on up

hosrom_951

I think Rage2 got 460whp (sleeved block) and used the stock IC

Cyrus951

TonyG used the stock intercooler on his 400+ hp car.

special tool

Rage was with a STOCK bottom end

I got 405 with stock intercooler

Tomas L

I'm sure Illmore Engineering can build an engine with 1000 hp around the stock 951 IC but that doesn't mean that it's a good idea. At 400 rwhp I'm sure that there is much to gain by switching to a bigger and more efficient IC. If it wasn't so troublesome to switch IC on a 951 I think that it would be worthwhile even in the 300-350 rwhp range.

DDP

if you run a larger IC with the stock power or even at 15psi, youll run into more lag.

Matt H

The problem with a larger intercooler is that there is almost no place to put it. At some point in the near future I will be cutting out the brackets and going to a large FMIC (as large as will fit under the stock bumper). However, this will not be until after dyno testing the "current" setup so I can gauge results. The stock IC is a decent unit, however.
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NZ951

Not necessarily true... IIRC if you increase the width you will but if you increase the height or thickness you wont... can anyone confirm this? I may have the orientation wrong.

Perry 951

The issues with the stock IC is the inlet and outlet tanks, especially after you toss in a higher flow turbo. Some of the vendors here have custom end tanks and show a moderate improvement in flow, and a small gain in pressure drop. This will be my next motor mod.

I've owned and worked on somewhat large 4 piston boosted cars my whole life, and my 951 has the largest intercooler out of all of them..... but it also has the highest charge air temps as well. At 17psi from a K27, I'm consistantly at 200-230 degrees. My Eagle Talon, for example, at 23psi from the stock AirResearch turbo, only saw 230 after major flogging. Temps were typically 180-200 degrees. The intercooler was about 1/2 the size and about 2/3 as deep, plus it had a horrid venting system.

Anyone else with high charge pressure temps?

NZ951

I am just making a IC to TB pipe with a temp sensor in it. Should be some fun. I saw 1.25 psi pressure drop across the IC with my 60-1 when testing. About the end tanks. I have not seen any dyno improvements from any vendor... I dont think it does anything to be honest.

Perry 951

Lindsey shows a little improvement. Look into the inlet side... the first 4 rows of core are damn near blocked... the first 4! The ones that will see the coolest air will have blocked flow. That's why I think there is flow and temp drop to be gained. If I could TIG aluminum like I can SS, I'd do the tank mod myself just to see.

I'm going to datalog the 2 temp sensors and a MAP along with my WB A/F. I should know pretty quick if there are gains in temp, hp, or flow by swapping the stock and modded intercoolers. Should be fun!!!

NZ951

How will you know HP? by association through the temp drop?

If its just temp drop, then a cold air box would help that! Ala what I am doing now... though I may end up getting someone to get me a LR maf trap if I can be bother making something to seal it off.

Perry 951

I have the Road Dyno. (a google search will find it)

It counts ignition pulses and converts them into an acceleration table. 99% of the people I talk to that have this contraption say it's within a few HP of a Dynojet. I have not been on a Dynojet yet, so I don't know. Since I have a way to record a baseline, I can still use it to log increases, or decreases in power.

With all this logging I've been able to self tune my car to 330hp/329tq at 15psi from a K27/8. It runs pretty clean, but some chips with better timing will help. I have pretty high exhaust temps as well. I stopped modding once I started looking into my temps.

NZ951

I know the kind... datalog as a wav file right?