545 engine help

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545 engine help

Post  outbackbbf on September 3rd 2013, 7:39 am

Hi to all,
New member to bbf world in the process of building a possible 545 stroker, p51 headed engine for my 78 f100. It will need to run on pump fuel which is 91 octane generally. It has a C6 auto, 9inch diff, runs 35inch at tyres and a daily streeter. My thoughts of 650 rwhp, 6500rpm limit, will probably be looking for a good pulling engine. I would like some more educated advice on my build please. Looking at using a scat stroker kit. Is there a disadvantage of using a dished piston to get right cr, over a flat top or thicker head gasket? thanks in advance

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Re: 545 engine help

Post  dave d on September 3rd 2013, 2:36 pm

Don't have the p51 head but running trick flow power port 290's 10-1 compression [pump gas] edelbrock torkor2 intake [ hood clearence ] 1050 carb just ran 10.56 @127 quarter at columbus and the car is 3250. So I'm sure with the p-51 is going to get you close to your goal----About time to add some nos to this car.
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Re: 545 engine help

Post  Lem Evans on September 3rd 2013, 2:39 pm

A dish piston is the way to go to get the compression correct for pump gas.

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Re: 545 engine help

Post  rmcomprandy on September 3rd 2013, 6:29 pm

outbackbbf wrote:Hi to all,
New member to bbf world in the process of building a possible 545 stroker, p51 headed  engine for my 78 f100. It will need to run on pump fuel which is 91 octane generally. It has a C6 auto, 9inch diff, runs 35inch at tyres and a daily streeter. My thoughts of 650 rwhp, 6500rpm limit, will probably be looking for a good pulling engine. I would like some more educated advice on my build please. Looking at using a scat stroker kit. Is there a disadvantage of using a dished piston to get right cr, over a flat top or thicker head gasket? thanks in advance
For 650 "WHEEL" horsepower in that vehicle you will need to make almost 800 "flywheel" horsepower.

Are you really ready for those kind of manners on the street...?. Personally, I would look for the TORQUE you are after and let the horsepower fall wherever it may.

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Re: 545 engine help

Post  outbackbbf on September 3rd 2013, 7:04 pm

[quote="rmcomprandy
For 650 "WHEEL" horsepower in that vehicle you will need to make almost 800 "flywheel" horsepower.

Are you really ready for those kind of manners on the street...?. Personally, I would look for the TORQUE you are after and let the horsepower fall wherever it may.[/quote]

This is why im talking with the best, how do u build an engine to a torque figure not hp, HP =comp + air flow? I thought one would come with the other.

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Re: 545 engine help

Post  outbackbbf on September 3rd 2013, 9:59 pm

So this is what im looking at so far,

Scat 4340 forged crank 4.500 stroke
Scat H beam rods 6.700 long
Bore of 4.390
Kaase P51 heads
Forged pistons to suit cr

Would I be better to run 6.800 rods ? what about be oil squirters? will the P51's be to big for a torque monster?

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Re: 545 engine help

Post  bbf-falcon on September 3rd 2013, 11:15 pm

Either of the two that replied to your post can get you what you need as far as info,knowledge AND parts.They both are reputable BBF vendors. Both are experts in that catagory. Lem or Randy.

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Re: 545 engine help

Post  69F100 on September 3rd 2013, 11:45 pm

bbf-falcon wrote:Either of the two that replied to your post can get you what you need as far as info,knowledge AND parts.They both are reputable BBF vendors. Both are experts in that catagory. Lem or Randy.
X2 On what Rick said
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Re: 545 engine help

Post  rmcomprandy on September 4th 2013, 12:31 am

outbackbbf wrote:So this is what im looking at so far,

Scat 4340 forged crank 4.500 stroke
Scat H beam rods 6.700 long
Bore of 4.390
Kaase P51 heads
Forged pistons to suit cr

Would I be better to run 6.800 rods ? what about be oil squirters? will the P51's be to big for a torque monster?
What you have there is fine ... it is the intake manifold, carburetor, camshaft and valve train which will determine the throttle response and manners of the engine, AND the FTD, (fun to drive), factor...

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Re: 545 engine help

Post  outbackbbf on September 4th 2013, 6:30 am

want to use fast ezy efi fuel system
was thinking of an air flow manifold of some description
don't really have any thoughts on cam and valve train, what ever is going to work best with lump ofcourse Very Happy 
do I need to pm you guys to talk further

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Re: 545 engine help

Post  rmcomprandy on September 4th 2013, 9:25 am

outbackbbf wrote:want to use fast ezy efi fuel system
was thinking of an air flow manifold of some description
don't really have any thoughts on cam and valve train, what ever is going to work best with lump ofcourse Very Happy 
do I need to pm you guys to talk further
That system will never get you even near your horsepower goals; you would need a more involved system to get there if having fuel injection is your plan.

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Re: 545 engine help

Post  outbackbbf on September 5th 2013, 7:15 am

Not knocking your intelligence but they have a claimed 1200hp system, I haven't used that particular system but have many races on the older smaller efi. I can only go on what I read, hence the reason im on here for professional advice. should I call or email

Im sorry I believe I have offended, this was not my intention sorry again, The EFI kit no is SKU 30403, is this still not good enough?

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Re: 545 engine help

Post  outbackbbf on September 6th 2013, 7:09 pm

Bump

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Re: 545 engine help

Post  rmcomprandy on September 6th 2013, 8:00 pm

outbackbbf wrote:Not knocking your intelligence but they have a claimed 1200hp system, I haven't used that particular system but have many races on the older smaller efi. I can only go on what I read, hence the reason im on here for professional advice. should I call or email
The EZ-EFI 2.0 system is a more involved system for higher horsepower ...
The EZ-EFI, (not 2.0) is not the same system.
One throttle body has 4 fuel injectors and the other has 8 fuel injectors along with ECM and control differences.
One EZ-EFI 2.0 kit is for a multi-port injection for retro-fit applications or like the INGLESE injection.


Several different engine build specs you are looking for, to have 800 flywheel horsepower, are all over this forum.
Do some more reading since you said you are good at that type comprehension.

EDIT: that throttle body actually works better if mounted sideways with the injectors on the sides of the engine.

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Re: 545 engine help

Post  outbackbbf on September 19th 2013, 8:11 am

Thanks for info so far, At what point would rocker stud girdles be required?

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Re: 545 engine help

Post  dfree383 on September 19th 2013, 8:57 am

Gridle's are a good idea with any performance application of your going to run stud mounted rockers.

When you say daily driver are you expecting something to last for 100,000 miles of daily driving?
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Re: 545 engine help

Post  outbackbbf on September 19th 2013, 9:07 am

No it would be lucky to do 150 miles a week, it takes me less than 5 mins to get to work, but I think I might go the long way round when she back on the road again (10mins)Laughing 

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Re: 545 engine help

Post  dfree383 on September 19th 2013, 9:50 am

I wouldn't get hell bent on trying to make the big numbers if you want it to last a long time and get alot of fun out of it.

And with your low RPM goals you may be a good canidate for a hydraulic roller cam, not the best HP choice, but it would be lower maintence and easy on parts.
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