5.3 vs Hemi thread in the racing forum
10-11-2005, 09:13 AM
#21
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Originally Posted by Jrgnd
Well if take your 345 HP Chevy and match it to a B&G custom tuned PCM Hemi(currently the only folks offering custom tuning) and start adding mods you will be suprised. Rumor is they made 40-60 HP at the crank from a stock truck. A bit hard for me to believe but if you take into account that the Hemi barely pass emissions, I.E. de-tuned to pass, than is more believable.
The programmers are showing gains of 20 HP or so average with some peaks of 30 HP at certain RPMs. Again if we could get full control of the operating parameters we could hope to see gains like Avsfan did ( but not at the high cost of a stand-alone and installation ).
10-11-2005, 10:13 AM
#23
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Originally Posted by ColtSteele
I picked up about 60rwhp from a cam and a custom tune on a 2nd gear dyno with the new torque converter (that is proven to show hp loss on the dyno). Guesstimates (since they couldn't get her to hold 3rd) are closer to 70-75rwhp in a 3rd gear 1:1 run. Made 314rwhp on the dyno on that 2nd gear run on 22's. Talked to the company that did the tune they say closer to 330-340rwhp. I should get it back around Halloween- then we'll redyno to see what I find.
10-11-2005, 12:20 PM
#24
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Its all about the "what if"
what are you getting done...or is it a secret!
if I could tell, I would (I'm bound by a nondisclosure agreement right now)
10-13-2005, 12:57 PM
#28
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Originally Posted by gonzo 6.0
I would love to race you in my 4x4 xcab,it would be a good race.If you want to race a N/A 5.3 RCSB you are about a second slow.
And I wish Dodge had your kind of aftermarket...Until we learn how to tune these Hemi's, we arn't going to get much faster without a buttload of spray.
10-13-2005, 01:20 PM
#30
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Gonzo, you gonna have to explain that second slow remark, mjfick and I run very close times and I crucify 95% of the 5.3's that I run across and those that outrun me are more than a few mods......
TJ
TJ