extremely high iats on track
A couple of days ago I was at a japanese car only meeting at a track, great day, it was awersome, and I did 3 rounds of two hours each, long story short I fried the toyota coils (again) and to solve the full boost missfire I gapped the plugs around 0.02" (0.6mm) with a cutter blade as a spacer, but the iat was extremely high, around 50-60 degrees over the ambient at the end of the straight (end of fifth gear on 6 spd and 3.636).
I never saw such increase on track, surely it was hot, over 30 degrees celsius, but I never saw anything similar this winter I dynoed the same day to see what power I lost, the configuration was: 8 degrees on the entire raw (just to lower the power on track), toyota cops, efr 6758 at 1.4 bar (20 psi, it's allofit with the medium boost actuator), trackspeed manifold and full 3" exhaust. It did 330hp on a dynojet, a little bit disappointing (virtual dyno said 370 this winter) but it's hot here now. The fmic is an ebay one I bought when I had in mind 200hp with a stock motor, now I'm built and I'm running allofit, can it be a restriction? It's rated to 350hp, should I put a taller one? the core is 550 x 140 x 65 (22 x 5.5 x 2.5) I've got all the hot side with 2" pipe, there was a 100 degree bend at the exit of the compressor, but all the rest is less than 40 degrees. Should I run 2.5 all the way? Also I popped the hot side pipe a couple of times during the straight, so the pressure drop is significant, maybe the ic is simply inadeguate for that kind of power? I tried to run wastegate only (0.6 bar / 8-9 psi) and the iat are just a couple degrees over the ambient :sad2: what should I do? |
I think it's pretty obvious you maxed out your ebay intercooler.
When ebay says "350 hp", in reality it's closer to 250. You need an fm intercooler or equivalent to your goals. |
Wheres your sensor located?
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Originally Posted by yossi126
(Post 1336181)
I think it's pretty obvious you maxed out your ebay intercooler.
When ebay says "350 hp", in reality it's closer to 250. You need an fm intercooler or equivalent to your goals.
Originally Posted by nitrodann
(Post 1336182)
Wheres your sensor located?
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Yes you are likely at the limit of your heat exchanger. Probably ok on street, but not track.
Look into the large fab9 vibrant or a large spearco or treadstone core. |
Originally Posted by 18psi
(Post 1336196)
Yes you are likely at the limit of your heat exchanger. Probably ok on street, but not track.
Look into the large fab9 vibrant or a large spearco or treadstone core. I have been totally underwhelmed with the Treadstone core I've been using in my car over the last couple of months. Way higher IATs and way more pressure drop than I was expecting. I would go buy a Precision 350hp. |
It worked very well on G's car, dunno. I'll re-check the logs for his IAT's when I have a chance.
Precision 350 is likely better, but he's already at 350chp and will likely keep turning it up, I think it will be a restriction at this point. |
I'm looking at a Precision 600 to replace my Begi #3. Merely on Highway I notice IAT's steadily rising under load. My car has always been weird with heating, I may replace the condenser or ditch all together. But I feel as though if I'm modifying a bumper and trying to keep A/C, I'd rather look at the Precision stuff and custom mount it than a vibrant intercooler.
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oh definitely it is WAY better than vibrant
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Originally Posted by psyber_0ptix
(Post 1336296)
I'm looking at a Precision 600 to replace my Begi #3. Merely on Highway I notice IAT's steadily rising under load. My car has always been weird with heating, I may replace the condenser or ditch all together. But I feel as though if I'm modifying a bumper and trying to keep A/C, I'd rather look at the Precision stuff and custom mount it than a vibrant intercooler.
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Originally Posted by psyber_0ptix
(Post 1336296)
I'm looking at a Precision 600 to replace my Begi #3.
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Originally Posted by psyber_0ptix
(Post 1336296)
I'm looking at a Precision 600 to replace my Begi #3. Merely on Highway I notice IAT's steadily rising under load. My car has always been weird with heating, I may replace the condenser or ditch all together. But I feel as though if I'm modifying a bumper and trying to keep A/C, I'd rather look at the Precision stuff and custom mount it than a vibrant intercooler.
it's nearly impossible to fit without remove the condenser and the ps oil cooler the precision 350hp is way bigger than mine (strange, ah?), would you run it with a "simple" 400hp goal in mind? |
this is just to clarify why there are just a few fellows in italy:
precision 350hp: 305$ shipment in italy: 160$ (total 465$) customs: 3% on total (now we are at 479$) italian VAT on total: 22% so a 350 precision fmic costs to me 584$ not double, but we are here... to compare an ebay fmic: mine costs around 90€ shipped from england, so without customs and including VAT |
Originally Posted by shuiend
(Post 1336302)
How much do they rise? What is your ducting like?
Originally Posted by Girz0r
(Post 1336308)
Did G ever end up selling his?? Still had tabs for mounting if I remember.
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Originally Posted by psyber_0ptix
(Post 1336328)
Who? Where? Paypal?
@EO2K :likecat: |
Sorry it done sold :cry: It's sitting on a shelf in @aidandj's garage next to some giant silly VNT or holset IIRC? Some sort of silliness at any rate. ;)
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Sadly the holset is gone. It was an hx35, I need an hx30. Still hunting. Latest crazy idea is an evo td05 with twinscroll.
If I didn't track my car I would already have my buddies he351.VGT ftw. Just not on a track car. |
Do you pay VAT if it looks like a used part? We could make one dirty and bend some fins for you and then ship it if that helps. You would just need to clean it and straighten a few fins to be perfect again.
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Originally Posted by sixshooter
(Post 1336343)
Do you pay VAT if it looks like a used part? We could make one dirty and bend some fins for you and then ship it if that helps. You would just need to clean it and straighten a few fins to be perfect again.
I just checked the pressure drop across the intercooler: at 7000 rpm: map 220kpa, after the compressor: 275 kpaI'm not sure, but I think that the ic is out of spec I think |
That's a huge drop. Increase efficiency or size.
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