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Stage 2 throttle body from r.a.t.for 3800 s.c. engine


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<BR>Does anyone have a stage 2 throttle body from r.a.t. for the 1997 to present 3800 s.c. engine. I would like to know if it's really as good as their site states.

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While I do not have the particular item you are looking at, I did have my throttle body enlarged on my N/A 3800 engine. A guy that does them for G/N's did mine. Increased from 57 mm to 62 mm. It did make a small difference in air flow available to the engine, however, off idle performance is slightly softer. I also had to back the idle stop screw all the way out to get the IAC to control the idle. The greater opening rate with the larger blade and stock linkage causes the slight "bog", although that isn't quite the right word for it, it just is a little softer at small increases in the throttle from idle. No bog in harder launches and there is a definite increase in performance. <P>------------------<BR>Hal, btk@vbe.com

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The chip could probably be reprogrammed to speed up the fuel curve but the softer throttle actually isn't a problem. The cheapest chip I have found for this car (Reatta) is $138.00 and about $50.00 to have the programming modified which I have had done twice. Being a front wheeler, the car will still scream the front tires at full throttle, and mid range and up are definitely stronger. Injectors don't care what type of engine they are in but I have to check to see if I will need larger ones. My car is sleeping for the winter and I didn't have time to run a diagnostic to see how much injector "on" time is being used right now. I've run a couple of turbo calculations and expected horsepower should be 250-260 @ 8 psi boost. I suspect this will outrun the stock system.I haven't done much on the turbo itself beyond combining two of them I have and porting the inlets and outlets. I also opened up the wastegate hole to be sure I can keep the boost down. I still have to finish my kids race Chevy 383 before I can get my spare engine back on the stand to start the fitup of the turbo. It's a winter project so I haven't been hurrying. <P>Sorry to get so far afield from the original topic.<P>------------------<BR>Hal, btk@vbe.com

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