right now i have bbk l/t,jlt s/r,sct2600,79# injectors,gt-40 pump and fpdm,accufab t/b and plenim,2.75 upper and 4# lower,off road h-pipe,flow master cat back and i want to upgrade but my dyno numbers seem kind of low to me, i had it dyno'd at hp performance in rosewell nm on a mustang dyno, 419 hp and 498 tq with 17 degrees of timing just seems low compared to every one eles on here. i want to know what my stock motor will take every day and keep in mind that i do not drive every day just on weekend and cruise nights. thanks in advance guys .
kb vs.whipple vs. ported eaton
- Thread starter svo90
- Start date
mustang dynos read lower than dynojet dynos from what i understand but i have never really heard how much lower it reads exactly.
This question is covered multiple times on this forum. Good answers can be found by searching the terminator threads with advanced search.
I agree your hp numbers seem very low. You are overspinning your eaton, which makes great torque up top but hurts your top end performance. You are a great candidate for a screw type blower.
I agree your hp numbers seem very low. You are overspinning your eaton, which makes great torque up top but hurts your top end performance. You are a great candidate for a screw type blower.
I agree on overspinning your stock eaton.
moonltgold
New Member
It did one once - back to back, and Dyno-jet was about 9% higher. So figure around 8-10% more I would guess. Plus, you're in NM (Roswell and Carlbad, NM are probably 3000-3500 ft above sea level (less oxygen), so that's another reason why your rwhp is low -- you probably lose about 5 rwhp for every 1000 ft.
You would see higher hp numbers with a bigger pulley. IE 2.93
Spinning a stock Eaton that hard calls for a port.. Or just say F-it and get a twin screw.
I loved my ported Eaton, but if I had kept my Cobra I would have definitely gone with a twin-screw (Whipple). :rockon:
I agree with what is stated above. You are overspinning your blower (either get a port or go twin screw) mustang dyno's normally read a bit lower than dynojet, and you may be able to add more timing :shrug: 17 seems kinda low, I'm running 21 degrees.
What I would do, sell the eaton and get a 2.3 Whipple or 2.6 Kenne bell (which ever one you find a better deal on)
What I would do, sell the eaton and get a 2.3 Whipple or 2.6 Kenne bell (which ever one you find a better deal on)
Ya I gotta agree with everyone else on this, overspinning the stock eaton creates way too much heat.
Either put a bigger upper on it or stock lower and up the timing.
Otherwise if your on a budget and wanna keep your pulley combo I'd send it in to Stiegemeier they have a huge sale on right now and a drawing for a free blower port!
~Mark
:beer:
Either put a bigger upper on it or stock lower and up the timing.
Otherwise if your on a budget and wanna keep your pulley combo I'd send it in to Stiegemeier they have a huge sale on right now and a drawing for a free blower port!
~Mark
:beer:
id do a port and spray if i can do it over again, twinscrew is nice though if your doing 20lbs+ imo...
ok the 17 degrees of timing is telling me this car is way under tuned!
you have injectors for a 800 hp car!
the timing for a ported eaton should be like 20 - 22 degrees(some people go as much as 24*). and that will be safe as long as it is getting fuel and air/fuel is correct.
get that thing ported and re tuned and you should see a lot of improvement!
i would like to see your dyno chart... your curve of your hp is probably getting peak hp way before 6000rpm's which would be a sign of over spinning your supercharger. now the eaton can take a lot more, but not until you get it ported.
i was running 17 psi on a stage three steig. and put down over 500 to the ground. i've seen guys in here over 550rwhp with a eaton... it has a lot left in it!
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svt4cobra6
Registered User
this may be covered somewhere else but I could not find it. Is a 2.8 upper ok without a port using the eaton assuming a good tune with cold air, high flow catted hpipe and mag catback?
Any of those options will be a great upgrade from where you're at now and your motor will be able to handle plenty provided you have a good tune.
His pulley combo is fine, numbers are low due to him having no timing.
No he's not
No he wouldn't
+1. His pulley combo is a bit agressive, but there is still much more power left on the table with the timing. And it will really shine once he has the blower ported.
His pulley combo is fine, numbers are low due to him having no timing.
No he's not
No he wouldn't
+1. His pulley combo is a bit agressive, but there is still much more power left on the table with the timing. And it will really shine once he has the blower ported.
yeah dude, way to much boost for that eaton. they say on a stock eaton u dont want to go more then the 2.8 or 2.75 pulley with stock lower. other than that u are just loosing power. Stiegmeir says that a ported eaton will handle up to 17 psi max.
Yes, you will be fine with that combo, thats what I have, in sig below
2.8/4lb 23* here unported and daily driven, it made 450/500. You just need some timing and a good tune. Sure we're spinning the eaton up and im not going to say a port wont do you some good of course it will, it just seems most dont go with these combos. I have yet to see complaints from people with a serious pulley combos.
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Please do some more research and talk to educated people before you post that garbage again.
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