Thread:

just want opinion

I have a 555 BBC, 9:1 comp, SRP pistons, Scat crank, Eagle H beam rods, pro topline aluminum heads that have been worked, Crower cam; .777 .731 288 290 @.050 110 lobe seperation, with the tunnel ram it made 764 horse on the dyno at 6000. heres my question; I'm putn my 10:71 mooneyham with Hilborn shotgun injection on E85, goin for 15-20lbs of boost, what do you think, will it work and how much horsepower should it make??

Originally Posted by DEL51

1 think it would work fine. I will guess 1375 hp. With that cam I would think more rpm than 6k.Any more details on the heads?

heads are 118cc i beleive, port and bowl work, SS valves

Originally Posted by EVILFORCE

Hi Cory. I know on most blower deals you should use Inconel valves. Does the E-85 keep it cool enough for stainless? We all know you pussy-foot around when you are in the boat.

Not real sure on valves, I'll ask, and pussy-foot around, not sure who u been watchn, lol, I don't think I've ever done that

Maybe a wider cam lobe separation and less duration would be better for a boosted application.
Looks like your cam has considerable overlap.

Originally Posted by blownboosted

@ 15 psi you can accomplish double the power of an engine in n/a form, I dont see why 1400 can not be reached with your deal.

Really? So that means the blower requires zero power to turn. Just put 15 pounds to it a wa la, double your power.
It might make 1000.

I was guessing around 950

Originally Posted by Unchained

Maybe a wider cam lobe separation and less duration would be better for a boosted application.
Looks like your cam has considerable overlap.

Hey Cory
X2 on the cam separation, Also hearing that about 32-34* of timing is about max .

HEY MARK
How much timing are you running on you motor -at what boost ???? and did you change timing when you ran methanol ?

................. Eric

Originally Posted by blownboosted

@ 15 psi you can accomplish double the power of an engine in n/a form, I dont see why 1400 can not be reached with your deal.

The turbo guys get away with that math (well, almost) but roots blowers, no way. Like GN posted, roots blowers take a bit to spin... Don't know enough about E85 to make an informed guess but my uninformed guess is way closer to 1k HP than 1400 HP. 1400 HP is totally doable with a cam change on methanol and maybe a slight compression bump...

Didnt realize a 10-71 would eat up 400hp to make 15lbs......

I am just going off an E85 496 we did this last summer as a test mule and ran it very hard! We were very impressed with it!!

10:1 c/r
hampton 8-71
14-15 lbs
edelbrock heads
I will ask if I can post the cam specs

It spun a stainless A impeller 7200 on the engine and 8,000 on a good shot nitrous. According to the impeller charts we have found it is making around 1200+ off the bottle, I know all the impeller charts are not 100% accurate but they get you in the ball park.....

If hydroman's 555 engine now makes 764 and will only make 950 with the 10-71 on top of it at 15lbs that would be very sad!!

Originally Posted by blownboosted

Didnt realize a 10-71 would eat up 400hp to make 15lbs......

I am just going off an E85 496 we did this last summer as a test mule and ran it very hard! We were very impressed with it!!

10:1 c/r
hampton 8-71
14-15 lbs
edelbrock heads
I will ask if I can post the cam specs

It spun a stainless A impeller 7200 on the engine and 8,000 on a good shot nitrous. According to the impeller charts we have found it is making around 1200+ off the bottle, I know all the impeller charts are not 100% accurate but they get you in the ball park.....

If hydroman's 555 engine now makes 764 and will only make 950 with the 10-71 on top of it at 15lbs that would be very sad!!

I didn't say 950, I agree it should be more than that, just not twice the NA power. The blower doesn't eat it all. Decrease the air volume by half, the temperature goes up proportionally which hurts it some too. Add that to the cam not really optimized for a blower and that will knock it down a bit as well.

That cam isn't right for either combination. 288/290 on a 110 for 9:1/6000rpm N/A? Definitely the wrong cam for a blower (IMO)
Nice thing about a blower...it makes up for all kinds of mis-matched parts.
It's a decent combination with the right cam and if you want to spin 7000rpm I think it's got 1200+hp potential written all over it.