Was thinking of dragging my Jimco over to play in the dust of Ausi. We originally built up the Nissan engine with 95.5mm pistons but had so much slap (with a stock bore engine) that pistons we collapsed a skirt. On cosworth's recommendation (the only ones to make a stock bore off the shelf piston) we dumped the stock bore and went a .5mm bigger on the new build. Which puts us over the cc limit for CAMS class 1. I highly doubt any of the Cosworth or other builders are using stock bore pistons. As such is anyone legal, and does anyone care/check if you're 10cc over the limit?
Pro Lite is even worse. Rebore a pro lite engine (to make it square) and you're 35cc over the limit.
-- Edited by RedMist on Tuesday 22nd of May 2012 09:26:35 AM
Should have kept your mouth shut, that way you could have come over here and no-one would know any better..! Unless of course you put that other engine in with the stock pistons that happens to be sitting in the corner of your shed?
I reckon there would be a few that are pushing the boundaries over here as well?
If a tree falls in the forest.... nobody ever gets tested. If anyone has ever heard of anyone ever being capacity tested in offroad please come forward. It seems to be too hard to bother with. I wouldn't be surprised if there are half a dozen 400+ cubic inch v8 chevs out there in various classes around the country but that's only fair because you can take a VQ35 out to just under 4.3 litres giving you an effective capacity of 7193 ccs. The ONLY thing keeping (most) people honest is personal integrity.
It's much easier for CAMS to ensure you have a fuel sample tap to increase the risk of leak and a fuel fire so somebody can fail you for the colour of the stale fuel in the dead-end tube. (it happened to a ute racer) Or measuring noise with completely inadequate methodology using uncalibrated equipment. Anti-lag makes a mockery of it anyway because the bangs are too short to measure on a properly weighted meter.
So put your "other" block and pistons in and bring it over. Just eat an extra meat pie for ballast to make up for the alleged 1 horsepower advantage.
__________________
Rebuilding the old Sootchucker.
http://www.facebook.com/pages/No-Throttle-Offroad-Racing/187297714680091
I know of it happening, a very long time ago. The guy that owned my car before me (I bought it in 86) got tested at Sea Lake one year. He had to pull the head off the then Datsun 1600 to check capacity. I think it was all place getters in 1200 & 1600 class got tested.
Daniel come on over as long as you have the following - side intrusion sorted ,go pro's metal mounts, 2 mil alloy floor , seat belt cutters, roof secured properly,under the noise limit ,fuel sampling,seat belts in date , these are just the last few requirements. And your Jimco might have a few cage problems.
But i wouldn't worry too much about the size of your engine that ones in the too hard basket!
Testing waters. Its more likely that I drag over the new CAMS caged Tatum. However it's underpowered for a 1 car (only a little rotary). Pro Lite would probably be an better option for someone who has no experience with your terrain. An NA rotary would be hopeless when compared to a V6. From there I thought about modifying the Jimco, however again I'm stuck with overbore. From this there was the logical question, considering I can't make any VQ legal, if anyone was legal? (which I highly doubt)
Looks like SCORE have addressed the engine cc issue.
CLASS 2 - ENGINE SIZE: Engine size is increased to 3.6 liter.
For those that don't know Class 2 is an attempt to attract Ausi twin turbo cars to the good ole US/Mexico. It's now 3.6ltr twin turbo.
As an aside the American's have been slow to pickup on turbo's. It's a class I'm sure a few Ausi cars would stomp on (and show up a good portion of thier class 1 cars). I only know of two class 2's to date. A truck powered V6 turbo and a Scooby powered single seater. Both would be walloped by a Nissan / Toyota V6 turbo. So if you have a chance... go have a play before they realize just what they have done!!
I gather the pro limitations isn't quite 3500cc?? Your proposing a 3517cc engine with a customised piston (every off the shelf piston I've seen goes up in .5mm increments). As you defined turbo only engine I gather the cc limit for pro lite is different?
I think what Matt is saying is that as the Pro limit is 6000cc and the multiplication factor is 1.7, you can have a 3529cc tubocharged engine in pro class.
I think what Matt is saying is that as the Pro limit is 6000cc and the multiplication factor is 1.7, you can have a 3529cc tubocharged engine in pro class.
Cheers
PS, this is why I stay in class 2!
Are you saying there are NO class2 cheaters/oversize?
My limited understand from a conversation with a popular engine builder
Nissan v6
Pro lite = one bore oversize (just enough to improve manufacturers tolerances)
Pro = two bores oversize.
Essentially the "cheaper" pro lite class is difficult because you need to find a stock engine that does not need a larger bore out or you are illegal.
One bore oversize would put your over the prolite cc limit. One oversize is 3517cc (that is if you can source .25mm oversize pistons). Generally pistons come in .5mm increments. In terms of pro class, again two bores oversize is outside the cc limit. You may be able to run a 95.75mm piston, if you can find one.
If you need some parts i get my engine part from real street performance in the states. CP pistons 8.5:1 95.75 with eagle rods $1299.99. I run cp pistons 95.5 with eagle rods.
If you need some parts i get my engine part from real street performance in the states. CP pistons 8.5:1 95.75 with eagle rods $1299.99. I run cp pistons 95.5 with eagle rods.
Any issues with either rods or pistons? At what boost level? I've heard reasonable things about the eagles in VQ at sedate boost levels.
I'm running cosworth pistons and rods. Not the cheapest of solutions and unfortunatley they don't do a 95.75 piston. We're running a rather sedate 1bar at 609rwhp. She'll pull substancially more.... I just haven't needed it yet.
