engine build ????

Buckhunter125@h · Oct 26, 2008

what order should you choose your components ? ........ 347 stroker ............ heads,cam , intake , ......... do you choose heads first ,then match the cam and intake to the heads ............ or choose a cam ,and match the heads and intake to it ?

in other words ............ the chicken or the egg ............ which comes first ????

67rcks · Oct 27, 2008

IMO
1) cam + intake + carb + gearing depends on how aggressive you want to be
2) compression ratio
3) heads (if still demanded)

it is very cost effective to do 1) and 2) at the same time if you want an aggressive cam

dennis112 · Oct 27, 2008

First you should define the desired goals of the motor build and use that as a guideline.

IMHO, heads are the most important part of the equation and should be chosen first--you really can't get too good of a head. Of course compression comes into play and you must have a suitable piston to reach your target ratio. Next I would choose the cam (or yet better have one custom ground for your application), based upon the desired compression, tranny, rear gear and your defined goals. I would save the intake for last and of course that is generally dictated by the expected rpm and use of the motor.

D.Hearne · Oct 27, 2008

Choose your heads first, stock heads just really don't go with a 347, unless you're just after killer bottom end stump pulling. And as Dennis stated, choose the pistons to match the heads in compression ratio.(what octane fuel do you want to feed it?) Next comes the cam and intake, there's lots of room to play with here, it all depends on what you want out of it. Do you want high end HP, or something that's easy to live with on the street(mileage and driveability)? Cam choice also has a lot to do with the octane requirement too, so keep that in mind.

rbohm · Oct 27, 2008

i agree with dennis and DH, first decide what you want from this engine, decide what rpm range you are going to run this engine in 80% of the time. then select the heads that will feed the engine properly in that rpm range. after that select the intake, headers, and cam.

10secgoal · Oct 27, 2008

dennis112 said:
First you should define the desired goals of the motor build and use that as a guideline.

Yepper

woodsnake · Oct 27, 2008

Gears in the rear should be considered also, as they will be dictated by the camshaft.

65ShelbyClone · Oct 27, 2008

Buckhunter125@h said:
what order should you choose your components ? ........ 347 stroker ............ heads,cam , intake , ......... do you choose heads first ,then match the cam and intake to the heads ............ or choose a cam ,and match the heads and intake to it ?

I agree with everyone that said to determine what goals you have for the engine and how you want to reach them. Since you already have the crank, rods, and pistons, I would first be looking at the heads, followed by the induction and exhaust, and lastly a cam that matches the combination.

Buckhunter125@h · Oct 27, 2008

400-425 HP ........... as much torque as possible .............. good manners for steet driving ........... but with a mean sounding idle !!!! ...................... 6000-6500 RPM max ............ 3.80 rear

rbohm · Oct 28, 2008

Buckhunter125@h said:
400-425 HP ........... as much torque as possible .............. good manners for steet driving ........... but with a mean sounding idle !!!! ...................... 6000-6500 RPM max ............ 3.80 rear

that is doable with a 347. probably the best head to use will have a 184 to 200 cc intake runner, and 2.02in/1.60ex valves. a header with a 1 5/8" primary tube and a 3" collector will handle the exhaust. for the intake side either a performer rpm air gap intake or a weiand stealth intake and a 750cfm carb. as for the cam, something along the lines of the comp cams 280h magnum cam, or the xe268h extreme energy cam should do the trick. i wouldnt go any bigger than these cams, or something similar as you start to lose drivability.

Buckhunter125@h · Oct 28, 2008

thanks

thekid760 · Nov 2, 2008

347 Roller block
AFR185's
RPM Air-Gap
650 Speed demon
XE274HR - or smaller such as XE276HR
1 5/8" Long Tubes

Solid 425hp, maybe more.

Remeber, advertised rpm range on cams will be lower when used on a stroker, obviously, if money permits, use the above recipe, but go custom cam and you wont regret it.

Decurion · Nov 2, 2008

thekid760 said:
347 Roller block
AFR185's
RPM Air-Gap
650 Speed demon
XE274HR - or smaller such as XE276HR
1 5/8" Long Tubes

Solid 425hp, maybe more.

Remeber, advertised rpm range on cams will be lower when used on a stroker, obviously, if money permits, use the above recipe, but go custom cam and you wont regret it.

Ditto. Although Im not so sure how much power youll find with a custom cam, it still pays to find the right cam for your combo.

Buckhunter125@h · Nov 2, 2008

will stroking my 302 make it a 347 roller block ? I've been out of the game for a long time and am just now re-educating myself.

Heck I'm so old school up until buying my 68 FB last spring I still thought 271HP from a 289 HIPO was impressive !!!!! ................... 8^)

65ShelbyClone · Nov 2, 2008

When people talk about a "roller" 5.0, 302, or 351W, they are talking about engines equipped with roller lifters and matching cams, also known simply as a "roller cam."

In short, you have to use a stroker kit to get 347ci and a conversion "kit" to get a roller cam.

thekid760 · Nov 2, 2008

Or buy a good used late model (85-95) 302 block. That will allow you to use stock style lifters with dogbones/spyter tray, and the use of normal base circle cams (ealry non-roller blocks had a smaller base circle thus limiting your cam choice.)

thekid760 · Nov 2, 2008

Read this, should answer many of your questions:

http://forums.stangnet.com/719569-302-stroker-information.html

Buckhunter125@h · Nov 3, 2008

does it behave well on the street ??? sounds like what I have been lookin for .

D.Hearne · Nov 5, 2008

thekid760 said:
(ealry non-roller blocks had a smaller base circle thus limiting your cam choice.)

No, not neccessarily. Either cam can be used, it depends on what lifters you choose.

thekid760 · Nov 5, 2008

Sorry, I was misinformed.

Thanks.

engine build ????

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