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wortdog
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Age Unknown
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Urbana, IL
Birthday Unknown
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fuel injection system design, open wheel formula cars, drag racing
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Joined: 25-September 02
Profile Views: 2,148*
Last Seen: 17th June 2013 - 02:14 PM
Local Time: May 16 2024, 04:35 PM
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Wort231
wortdog
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5 Dec 2007
I found this on Tuners and figured the other tech-heads might find it interesting, as it covers the hard numbers of stock, stroking, and destroking:
http://www.kidzuku.com/StrokeOrNot.pdf
1 Jun 2007
I figured I might as well start a project thread for my sequential twin turbo car, since I'm actually doing things to it nowadays.
The new motor is: 2.3 6-bolt stroker with Manley rods, Ross 9:1 pistons, and squirters deleted Mitsu metal HG Creebonics mildly ported head with 1mm oversized Ferrara valves, Si single springs and retainers Crower 64415 cams (old version with wimpy exhaust cam, advertised as 292/288, more like a 280/268 in todays terms) JMF race version SMIM Q45 90mm throttle body ugly 2G exman with 60mm wastegates welded on twin sequential-parallel EVO3 16g's Fuel system is: 850cc FIC injectors Walbro 190 intank feeding a Bosch inline hatchmounted Coolingmist methanol injection Engine management: Eprom ECU with Ostrich Eprom emulator and Tuner Pro RT Innovate LM-1 wideband MAF Translator Gen2 with wideband AFR tracking Transmission/clutch: Was stock with Spec stage 3. Who knows what's next. I'm looking for about 550-600whp with a powerband of 3k to 9k rpm. With the heavily cammed stroker motor, the Evo3 hits like a sledgehammer around 3100. I think with stock cams/intake manifold it'd spool a lot earlier, but 3100 is good enough. It's pretty quick even at 15psi. The front fascia is just a rough cut now, I'm planning on fiberglassing, ducting, and smoothing everything out. Unfortunately, the transmission wasn't too pleased with the newfound torque output: I think this happened first. And caused this from a lack of fluid. I'm thinking I'll probably go with twin disk clutch and a transmission with an EVO 3 double synchro "close ratio" gearset in it. I doubt the Spec 3 would have held up for very long anyway.
5 May 2007
I finished putting together my car tonight, let it idle for a while, checked for leaks, and then took it for a first drive to the gas station to get some gas for its nearly empty tank of year old plus gas. I pulled back up to the garage and let the car idle for a bit while I open the door, I heard a thunk, grinddddd and the car shutoff.
The bolt holding the intake cam sprocket backed off, letting the cam stop spinning when the cam sprocket popped off of the cam. Both intake valves in cylinder 3 appear to be bent as the valve springs are sitting lower than all of the others. I could have sworn I torqued both of those cam shaft bolts, but apparently not correctly.
15 Apr 2007
Well, I've got most of what I need to finish up my car, figured I may as well post pics up of some the highlights. My welding isn't exactly what it used to be, not that it was ever all THAT good.
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