A question for those who have forge pistons
- Cookiemonster
- Mother Goose
- Posts: 3177
- Joined: Thu Jan 08, 2004 4:33 pm
- Location: Sydney
There was an interview with Jim Richards in a magazine a little while ago, said he had an adjustable boost valve hidden behind a vent in his Godzilla GTR. Wind up boost, close vent, qualify, wind boost back, close vent, scrutineer. Also heard about engine bay fire extinguisher spraying onto intercooler. Just happenend to have enough gas to run out just before the start finish line. Nifty tricks....
sorry to interrupt the current thread (there was a great interview with gibson a while back in zoom funny stuff) but does anyone have an answer for the above because i'm pretty close to point of deciding whether or not to try vr4 rods and pistons.4g6beat wrote:does this mean i could use vr4 rods and pistons on the single cam head? as i've got a spare set lying around in my garage and i'm having my engine out soon. would be good to be able to handle a little more boost than the std pistons & rods.The Evo 1-3 valves and Galant VR4 valves should be the same or close enough to not matter.
thanks guys :)
How fast do those doorhandles go mate!
- SpidersWeb
- postwhore!
- Posts: 1984
- Joined: Wed Jan 28, 2004 2:29 am
- Location: Wellington, NZ
I want to know this also. I'm doing a rebuild soon and I dont really want to spend the money on a forged engine, but using VR4 components if possible would be fantastic.Fuel wrote:So you used VR4 pistons with the 4 valve reliefs, with the single cam head?
I assume the valves would then be able to hit the pistons if the timing belt breaks...
I dont expect my cambelt to snap, as I'm having a new one fitted.
Extra questions - do you need an aftermarket computer and/or adjustable timing or anything additional? As far as I know, the VR4 compression ratio is the same.
1997 Mitsubishi Lancer Evolution IV 4G63BT
1996 Nissan Maxima VQ30DE (for sale, suit someone who likes the feel of boats when driving)
1996 Nissan Maxima VQ30DE (for sale, suit someone who likes the feel of boats when driving)
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- almost postwhore
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on drive.com.au they are listed as having a compression ratio of 7.8:1, compared to 7.6:1 for a staz:
http://www.drive.com.au/buy/market_valu ... y=4D+SEDAN
http://www.drive.com.au/buy/market_valu ... y=4D+SEDAN
- SpidersWeb
- postwhore!
- Posts: 1984
- Joined: Wed Jan 28, 2004 2:29 am
- Location: Wellington, NZ
I would hope that we all use new timing belts building engines...They last for ages if you have no oil leaks at the front and are very easy to change when the time comes. Otherwise bent vavles may be an issue, but most na engines are in this category anyway, so look after your engine...and belt! They seem ton last well into 100,000kms, but we change them more often than that. They are a cheap part to replace.
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