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#1
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Upgrade choices / suggestions?
Here is the car's current setup:
Engine/Exhaust: -rebuilt about 3k miles ago -204/214 cam - flat tappet -ported stock heads -steel center main caps -double roller timing set -020 forged JE pistons -60# mototron injectors -hotwired Walbro -3" LT-1 MAF with translator -TurboTweak chip -160* t-stat with billet neck -Caspers cam sensor cap -3" ATR downpipe -Turbonetics Evolution wastegate with in-car adjustability -test pipe with cutout -Hooker 2.5" catback -Rebuilt G-80 rear Stock turbo set @ #18s max right now, stock trans and converter. Can't make any baseline passes because the trans needs to be rebuilt. Or I should say it's flaring up at WOT and when it warms up it hesitates to shift on th 2-3 and whines a bit. My ultimate goal is to have a street driven, high 10 - low 11 second car that will see the track a few times a year. As far going forward, I'm assuming if I go bigger turbo, that the way it's currently configured, that it's got sufficient fuel...? Based on my goal, what would be the required or optimal turbo / converter combo? Also, if I do the converter while doing the trans, will the car still be streetable until I do the bigger turbo? Based on the re-build specs, how much boost would be considered to still be 'safe' assuming the engine is tuned correctly. Based on what I've read, it seems to be a good starting point to reach my goal. I realize the turbo/converter aren't the only thing that it's going to take but figured they'll be the biggest contributors at this stage. Thanks in advance. Dan |
#2
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Re: Upgrade choices / suggestions?
with what you currently have, and a WCC converter,decent stock location intercooler or front mount and a PT67/76 ball bearing turbo @ 20-25 psi you car will run into the 10's
this is all of course with good tunning, traction, etc.... I have built two cars with mostly the same stuff you have listed and both have run 10.5- 10.80 range.. on pump gas with an alky system.. |
#3
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Re: Upgrade choices / suggestions?
A single Walbro is VERY iffy for your expectations.
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Scott Keller - GNTTYPE Founder & Moderator
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#4
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Re: Upgrade choices / suggestions?
good call Scott, the cars i built were also using "double pumper" fuel pumps..
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#5
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Re: Upgrade choices / suggestions?
you can go plenty fast on a single if you add in a good alky system like razors dual nozzle
a car i work on here went 10.18 129 on a single intank walbro (340M from racetronix) with a razor dual nozzle pushing with a 70bb and 83 injectors (of course nowhere near max duty ) on a full cage car weighing about 3700lbs with driver oh and on 93 octane , footbrake launch, stock ecm with a TT 5.6 chip stock fuel lines too mellissa went 9.90 on a single , stock lines and rails along with dual razor alky kit
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Paul, - www.MAGNAbuick.com - the 87 -GNx'd the 86 -GN 71GTQ FAST th400 PTC 9.81 @137.68 1.46 60' 93 and alky the 87Ttop-Gn 74gtq XFI TR6 200-4r PTC caged http://www.streetfire.net/video/86-b...as_2425180.htm Last edited by PaceCarTA; 02-06-2009 at 12:19 AM. |
#6
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Re: Upgrade choices / suggestions?
i know all about Grumpys combo, and i know it can be done on a car using alky..
But having two "intank" pumps is a good safe guard |
#7
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Re: Upgrade choices / suggestions?
Thanks very much, guys.
As far as the trans..while it's being rebuilt, are there any considerations there or is the stock 2004R beefy enough on a rebuild to handle all of this? Dan |
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