{"id":696,"date":"1996-05-15T10:54:23","date_gmt":"1996-05-15T10:54:23","guid":{"rendered":"http:\/\/roadraceengineering.com\/blog\/?p=696"},"modified":"2011-08-28T10:57:37","modified_gmt":"2011-08-28T10:57:37","slug":"marc-s-racing-comparison-with-eric-lus-95-gsx-first-race","status":"publish","type":"post","link":"http:\/\/roadraceengineering.com\/blog\/1996\/05\/15\/marc-s-racing-comparison-with-eric-lus-95-gsx-first-race\/","title":{"rendered":"Marc S – Racing \/ Comparison with Eric Lu’s 95 GSX – First Race"},"content":{"rendered":"
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\"\"<\/a><\/p>\n

This weekend Eric (“EricATCA”) and I got together to compare 95’s.
\n(He has a T25 turbo with upgraded compressor wheel (Super 60)
\n& since I am in the market for a performance turbo, I wanted to see
\nhow it ran). Eric’s a great guy, and it was a fun afternoon.
\nThe performance results are somewhat surprising…<\/p>\n

Here’s a description of the 2 cars-<\/p>\n

Eric’s 95 GSX\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 My 95 GSX
\n————-\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ———
\nK&N FIPK\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 K&N FIPK
\nNology Hotwires\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Magnecor 8.5mm wires
\nTrust 2.5″ Exhaust\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 RSR 3″ Exhaust
\nHRC Intercooler pipe upgrade\u00a0\u00a0\u00a0\u00a0 Imagine Motors Intercooler pipe upgrade
\nTest pipe\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Stock catalytic converter
\nBuschur 2.5″ down pipe\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Stock down pipe
\nEVC (was set at 16psi)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Stock (no boost control)
\nT25 w\/ Super60 compressor\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Stock T25<\/p>\n

I really expected Eric’s car to leave me behind. The test pipe &
\ndownpipe should have made a nice difference (25+ hp?), not to mention
\nconsistent & higher boost from the EVC, and a bigger turbo flowing
\ncooler air.<\/p>\n

The results though?… I was usually 1-2 car lengths ahead for the
\nduration of each race! The pattern was as follows- as soon as we
\nboth stomped on it (almost all races were done from a roll)
\nmy car would pull a little ahead. My smaller compressor wheel got into
\nboost a little earlier, enough to give me a car length usually. At
\n“upper midrange” we were around even, at upper revs Eric would start
\nto pull a little. When we hit second gear, it was “1st gear all over.”
\nI’d pull a little further on him initially and pretty much manage to hold
\nmost of my gains. Towards the higher rev range he’d probably close a
\nlittle distance. We took it to the top of third gear once or twice,
\nbut the results were still pretty much the same, the nose of his car
\nwas behind my bumper from a few feet to 1.5 car lengths.<\/p>\n

I should mention that also having been in his car as a passenger,
\nit definitely pulls a harder than my car from 4500rpm on up. I think
\nwith a little better shifting the races would have been closer. But
\nthat would mean 2 cars dead even when one has more mods..<\/p>\n

Now, trying to sort out the why’s… Clearly a performance downpipe and
\na test pipe give better performance and were helping him. Though the
\nEVC probably helped a bit as well (a little more boost + wastegate
\nheld closed longer) for simplicity’s sake I’ll ignore any gains the
\nEVC should have been giving his car. That leaves: the Trust 2.5″
\nexhaust vs. my 3″ RSR exhaust, the HRC Intercooler pipe upgrade vs.
\nthe Imagine Motors upgrade, and the upgraded T25 vs the stock T25.<\/p>\n

I figure the RSR 3″ had to have helped me for some of that. We both
\nnoted that in addition to the difference in pipe diameter, the Trust
\nexhaust has a relatively sharp bend near the muffler, and necks down
\nto 2 1\/4″ where it meets the test pipe, whereas the RSR is very straight
\nthroughout, and necks down to 2.5″<\/p>\n

Intercooler pipe upgrade… I don’t feel as comfortable making any
\nclaims here other than that the HRC upgrade only upgrades the area
\nfrom the intercooler up to the blow off valve, whereas the Imagine
\nMotors upgrade continues up from the blow off valve to the throttle body,
\nand replaces the stock throttle body elbow (which has a nasty sharp
\nedge\/kink inside it) with a bigger\/smoother elbow.<\/p>\n

Eric & I felt that the T25 made the big difference. Upgrading
\nthe compressor-side-only meant more lag, and because the exhaust side
\nstayed stock, it probably had too much backpressure building up there.
\nAt the least the turbine wheel needs to be clipped. More likely the
\nturbine wheel needs to be upgraded as well. I’m unsure on whether
\nthe compressor wheel shouldn’t be downsized as well to perhaps a
\nstandard 60 wheel.<\/p>\n

Eric will be upgrading the exhaust side of his turbo soon, with a bigger
\nturbine wheel and a clip. We’ll get together again and see exactly how
\nit affects things. Though I’m looking to upgrade a few items on my car,
\nI’m going to hold off until we can do this comparison. It’s important
\nto see what works and what doesn’t. I’m hopeful (and I’m sure Eric is
\nas well) that when his new turbo goes on and we meet again, that his
\ncar will soundly take mine when we race. I’d hate to think that a
\nTD05 is the -only- way to go. I’d like to keep the T25 if possible
\nfor the sake of warranty. So far all my mods are ok with my dealer,
\nbut putting on a different turbo would probably change all that.<\/p>\n

(Thanks again Eric!)<\/p>\n

-Marc<\/p>\n

\n\t\t\t\t\tTweet<\/a>\n\t\t\t\t<\/div><\/div>
\r\n\t\t\t\t\t\t\t<\/a>\r\n\t\t\t\t\t\t<\/div><\/div>
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<\/div><\/div>","protected":false},"excerpt":{"rendered":"

This weekend Eric (“EricATCA”) and I got together to compare 95’s. (He has a T25 turbo with upgraded compressor wheel (Super 60) & since I am in the market for a performance turbo, I wanted to see how it ran). Eric’s a great guy, and it was a fun afternoon. The performance results are somewhat […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[16,33,15],"_links":{"self":[{"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/posts\/696"}],"collection":[{"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/comments?post=696"}],"version-history":[{"count":2,"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/posts\/696\/revisions"}],"predecessor-version":[{"id":698,"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/posts\/696\/revisions\/698"}],"wp:attachment":[{"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/media?parent=696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/categories?post=696"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/roadraceengineering.com\/blog\/wp-json\/wp\/v2\/tags?post=696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}