^ That's what I thought, factory gauge shows redline about 5700 RPMs.
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^ That's what I thought, factory gauge shows redline about 5700 RPMs.
5749 was factory set in my tune as rev limit but i haz autocraptic.
Sorry, meant to say the limiter. It was revved to 6500, don't want to spin a bearing. Bottom end is stock.
My wife's car is a bolt-on (LT's, 1.6 rockers, EWP, 36lb injectors) with a 306. Other than the rockers the heads are completely untouched put down 351/351 only taking it to 6000. A good tune is where a lot of it is at.
Seems like the LTX cars like to be a little richer than the newer stuff. I have seen 2-4 tenths of track time gain from 13.0 WOT to 12.2 in a couple of the heads/cam cars I've done. I would definitely go a fuzz richer and stuff some more timing in it if you can. Mail order tunes are usually 35-36* of timing, so you can sometimes get another 1-2* in and make more power. Just depends on the car. While a mail order tune gets the car running OK, they leave a LOT on the table.
I would also go to a NGK TR6 plug with your setup too. Especially if you run a 160* thermostat. Going to a colder heat range seems to be a good move with most heads/cam cars, even without nitrous.
What valve springs,rockers, pushrods are u running? Run a fuel pressure test, just for kicks?