Post by Warren and Toni Draughn on Jan 22, 2007 19:35:41 GMT -5
Currently, about all Chevette's competing have been required to only run the original 1.6 Liter engine that comes with the car. It actually turned out far better after some shuffling in the early days of 4 cylinder racing in the area when some engine swaps were tried.
From the start, many teams liking the handling ability of the Chevettes (especially the die-hard Chevy teams) but wanting more performance out of the engine tried anything they could to gain more performance out of the 1.6 engine with limited success since there isn't much bolt-on performance parts available for the 1.6 Chevette engine versus the Ford 2.3. Early on, a few teams found that a S-10 2.5 Liter truck engine would fit in the car with some modifications and a different transmission (usually a 3 speed). BUT, the final results of the change was that the added weight of the 2.5 along with the heavier transmission and clutch package actually hurt the performance over using the original combo. The horsepower to weight ratio (performance) mades the 1.6 the better choice for performance with it being capable of cranking upwards toward 7000 PRM without any modifications. Naturally, take great care in having the engine rebuilt along with keeping up weekly servicing (fresh multi-viscosity racing oil and filter every week) and keeping fresh bearings at all times (I've actually seen some very dedicated Chevette teams change bearing in an engine at the track on race night) keeps these little "mighty mouse" engines buzzing lap after lap.
What eventually stopped the practice of using a 2.5 in a Chevette was when some teams found out about using a 2.5 Liter "Iron Duke" engine[/i] that was capable of major performance improvements and available aftermarket performance parts. These engines are largely used in off-shore power boat racing on the ocean because of their performance capabilities with some very high horsepower available (sometimes over 500 Hp from a carbureted engine). These engines are also very easy to spot when you see one with major differences in the shape of the blocks.
The biggest performance advantage of a 1.6 L engine is the horsepower to weight ratio when using the stock clutch and transmissions and getting a good rebuild done on the engine prior to racing it. Having everything in the engine fresh is the biggest performance secret of the 1.6 engine.
Check with any of the local engine builders and they can fill you in on getting the most performance out of your 1.6 engine package.
On the rims, just like any original street rims, the Chevette rims are extremely weak for dirt racing purposes. It was not uncommon to see several rims break when racing, causing wrecks and plowing up the racing surface every night when these rims were required by the track rules. A thicker racing rim is grealy prefered not just for performance, but also to reduce accidents and destruction of the racing surface. It's not so much a performance advantage versus having rims that will hold up to the extreme demands of racing.
The final word on all of this is to check with each individual track that you will be competing to make sure what the rules are and follow them accordingly.
Good luck this season and have a ball.
"What is, IS. What ain't, AIN'T. Until it IS, it AIN'T."[/i][/color][/size]
to use an old quote from days of thunder......there's nothing stock about a stock car, this is surely true at isom............just go watch and listen to the so called stock 4cyl.s and you'll know how to build yours..........maybe use a chevy 350 if you could hook it up then you might be able to compete..........
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