I have a Kenne Bell 2.8 liquid cooled supercharger with a 3.5 inch pulley, long-term long tube headers and 60 pound fuel injectors ,Kenne Bell boost a pump and I am getting 600 rear wheel horsepower. But Kenne Bell formula for that pulley and supercharger says I should be getting 660 rear wheel horsepower I also have an AEM methanol injection kit which gave me an additional 20 rear wheel horsepower. Does this sound right to those in the know?
Kenne Bell 2.8 lc dyno numers
- Thread starter Banshee06
- Start date
Are you on pump gas?
What timing and boost (stock lower pulley im guessing it was 14-16 psi if you have stock manifolds)
Was it a dyno jet or mustang dyno?
I just had my 2.6 car tuned, has a 4lb lower and 3.5 upper, at 20.5 psi and 23 degrees timing on E85 made 660/600 on a dyno jet. Guessing with 93 and reduced timing mine would have been roughly same hp as your. I can't comment on meth injection but I will say if you have E85 readily available near you I'd switch to that, but you'll need some 80 lb injectors too.
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I have 18.5 lbs of boost even though Kenne Bell says with the 3.5 upper and stock lower should be 20 lbs on the 2.8 supercharger
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Im running 17.8psi on pump gas and have similar numbers to you. Without going E85 I dont see you getting to 660rwhp. But if you get up to around 21psi and E85 youll hit it for sure.
My 2.8h non LC KB on 93, with 18.5 psi, I made 611hp and 604tq. That is a stock 3.75" upper and 2lb lower. Headers lowers the boost from KB's chart. The 3.75" upper should be 18.5 psi alone....
My first tune with stock manifolds, I made 580. Then headers, no cats, I made 602. Then I did the fuel system and small stuff, made the 611. All on the same dyno jet.
My first tune with stock manifolds, I made 580. Then headers, no cats, I made 602. Then I did the fuel system and small stuff, made the 611. All on the same dyno jet.
Just FYI, pretty sure the stock pulley is 3.50" on the 2.8H, not 3.75".
Currently mine makes 630hp/565tq with 3.25" pulley, Kooks 1 3/4" longtubes, 2.5" exhaust, JLT Max boost, SCT 3000, and Accufab TB. It's right at 20-21psi on a cool day, and 15* of timing.
It was previously making only 15.5psi and 565hp/530tq on a hot day with a crappy BBK/stock intake and 3.5" pulley.
So, the intake and weather definitely makes a difference.
Currently mine makes 630hp/565tq with 3.25" pulley, Kooks 1 3/4" longtubes, 2.5" exhaust, JLT Max boost, SCT 3000, and Accufab TB. It's right at 20-21psi on a cool day, and 15* of timing.
It was previously making only 15.5psi and 565hp/530tq on a hot day with a crappy BBK/stock intake and 3.5" pulley.
So, the intake and weather definitely makes a difference.
KB's chart is for more stock exhuast. Or at least factory manifold cars.
For example, when I had a 2.4KB with factory logs, it was hitting their target boost, but when I went to a 2.8 with headers, it dropped from their target psi.
Are you all running the original stock block mine is a remanufactured one? Any difference?
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Without knowing who did it or to what specs, there's no way to tell.
It could be stock specs or it could not be.
Mine is still the factory sealed longblock.
i have a kb 2.8h non lc. with a 3.65 upper only makin 17.5lbs stk manifolds off road exhaust and make 585/545. what is your boost with the 3.5? your gonna be down psi with the longtubes. but flowing more volume. so making good power. you may want to try goimg to a 3.25 pulley. and you may be close to your 660.
I am at 18.5 with the 3.5
3.25 would be next but I wonder if I can get the belt tight enough.
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3.25 would be next but I wonder if I can get the belt tight enough.
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so you have longtube hedders..are running a 3.5 pulley and making 18.5lbs boost??? you have cats? seems really high boost..might need smaller belt. have a snub idler?
Kenne Bell said not to use a snub idler so I took it off
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i understand that. your choice. whats your full exhaust set up? your psi seems high. what altitude?
We are only at 200 ft
bbk headers, kooks high flow cats, bbk x pipe and borla catback exhaust
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bbk headers, kooks high flow cats, bbk x pipe and borla catback exhaust
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so you have kooks cats welded in to a bbk x-pipe???
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