Info for a 331/347 stroker build

[stprorolla49]

Within this next year i will be starting either a 331 or 347 build with my dad. Im looking for a streetable combo that i'll be using as my daily driver with plenty of power to run mid 12's or better at the track on 315 nitto dr's. Im looking for good parts, but nothing that will break the bank because im on a college budget. So far, i'm looking at a stock block build 347, scat cast crank, scat 4340 i-beam rods, and scat forged pistons (its a rotating assembly from summit complete with rings and bearings). For heads im looking at AFR 185's, intake im looking at the Systemax, Eddy Performer II, and the TF R Series. I am still unsure if i wanna get a custom cam ground or an off the shelf cam, but i was looking at a few Comp and Lunati cams in the .510-.530 max lift range. Im looking to keep it at around 10.5:1 compression so i can run pump gas. Please help me with some parts ideas with this build such as the rotating assembly and cam. Im pretty set on the AFR's as i know they are a quality head, and many people run them and love them and im just gonna look all over and find the cheapest price on one of the above mentioned intakes because they are all very similar and all within a few HP of each other. Thanks guys. As much info as i can gain on stroker motors is what im looking for, as well as the perfect combo for the best value

 

[blksn955.o]

I would REALLY look at what others run with those heads as far as cam...if I was to do an alum. head stroker with some good fixins' I would save for a custom cam. Part of me wanted to go custom when the heads were ported...kinda still wish I had. But money was an issue (was still in college and buying a house). IF you cannot go custom at least see what results are had from off the shelf cams other use with a sim. combo.

my.02

 

[OrangeMustangGt]

yup...actually your combo sounds pretty good.

afr 185/ custom cam/ systemax 2 intake

OR

i hear people are getting good power out of the VIC JR parts...

i say you want a custom cam anyways...best way to get everything perfect.

 

[stprorolla49]

yup...actually your combo sounds pretty good.

afr 185/ custom cam/ systemax 2 intake

OR

i hear people are getting good power out of the VIC JR parts...

i say you want a custom cam anyways...best way to get everything perfect.

yea i think a custom cam is probably a good idea....i guess what im really really looking for is info on rotating assemblies

 

[WhiteDevil]

If your staying N/A with it that sounds like a good rotating assembly. I have

Probe Cast Crank
Probe Forged I beam rods
Probe Forged SRS pistons

 

[BlackVert]

yeah, it's hard to go wrong with those parts. but definately get a cam ground by either ed curtis or jay allen

just what sort of info about rotating assemblies are you looking for?

 

[Zero Signal]

My builder ended up doing

Scat cast crank
Probe forged pistons
Probe forged pistons

For the rest of the combo, he has tested my exact setup with other customers and had excellent results with the Comp XE274HR cam and Brodix heads. There's practically an infinite amount of off-the-shelf cam grinds to choose from, I still don't think the 'custom ground' cams are worth the money.

 

[stprorolla49]

i just wanted to know what rotating assemblies you guys would recommend, prices, buy them balanced or take them to a shop...basically, guys that have done this, take me thru your build steps including all pricing and such...thanks!

 

[blksn955.o]

When I was going over my engine build I was looking at getting the parts done and going with DSS/CHP. The pre-assembled shortblocks are a fairly good deal. I didnt go with a stroker as at this point I dont want one...

If I was to piece together a stroker kit though I would have a very reputable local shop to the ball. work just to be sure esp. to have it done with the actuall HB/Flywheel that would be run. RNHperformance from here may be able to help you as well with the rotating stuff isnt he "kinda" in your neck of the woods?

As far as the custom cams price goes, I feel its more for the cam makers knowledge that the extra cost goes too, not that the cam is magical for being that much money. If you want results with 0 doubt if the cam is a good match...go custom. If you find several OTS cams people are running and those combos are what your looking for go with one of those OTS cams.

 

[stprorolla49]

When I was going over my engine build I was looking at getting the parts done and going with DSS/CHP. The pre-assembled shortblocks are a fairly good deal. I didnt go with a stroker as at this point I dont want one...

If I was to piece together a stroker kit though I would have a very reputable local shop to the ball. work just to be sure esp. to have it done with the actuall HB/Flywheel that would be run. RNHperformance from here may be able to help you as well with the rotating stuff isnt he "kinda" in your neck of the woods?

As far as the custom cams price goes, I feel its more for the cam makers knowledge that the extra cost goes too, not that the cam is magical for being that much money. If you want results with 0 doubt if the cam is a good match...go custom. If you find several OTS cams people are running and those combos are what your looking for go with one of those OTS cams.

Rick isn't really in my neck of the woods lol, but theres a guy my dad has been using for some time now for all of his machine work and i'll probably use him to balance the rot. assem. As for the cam, im leaning towards an OTS right now because there are SOO many out there that there has to be one that is perfect for what i need. I mean, most cam kits are less than $200, and come with lifters.

 

[blksn955.o]

I have no doubt you can find someone running a sim. combo with an OTS cam that is in your range of goals. No shame in cutting that corner IMHO, just ask the questions and do the research.

Scat is not bad stuff esp. for your plans/goals, I would just go to the guy you have a history with (that is a good history) for the ball. work.

 

[Zero Signal]

If you look at Comp's catalog, you can choose basically exact specs for your cam including the stick they grind it from. If you have a really good local engine builder, he will most likely be more than happy to provide you with a cam design after having your business. It would be in your favor to order your heads and intake through him too. At least that has been my experience.

 

[stprorolla49]

If you look at Comp's catalog, you can choose basically exact specs for your cam including the stick they grind it from. If you have a really good local engine builder, he will most likely be more than happy to provide you with a cam design after having your business. It would be in your favor to order your heads and intake through him too. At least that has been my experience.

Well i plan to build the motor with my dad actually, but the machinish will take care of boring and notching the block, and balancing the rotating assembly...

also, whats a decent aftermarket 28oz balancer? and can i use another stock 28oz flywheel? i just dont see spending like 300 or more on a fidanza for a street car

 

[Zero Signal]

The builder milled out my stock flywheel for $50. As for the balancer, you'll be fine with a Pro Products one. If you really want to spend some dough you can go with a Romac. They're worth the money but I don't think it's needed.

 

[Killercanary]

If you are doing the assembly yourself I highly suggest you contact Kevin at http://www.kskustoms.com for your Scat stroker kit and AFR heads. He will work up a package deal for you that I doubt you'll beat anywhere else, make sure to tell him I sent you. I bought EVERYTHING from him. The dart block, Scat rotating assembly (mine is the 4340 forged crank, 4340 forged H beam rods with ARP 2000 rod bolts, and SRP forged pistons), fidanza aluminum flywheel, Powerbond SFI neutral balance balancer, and Canton oil pan. I went neutral balance because going 28 with these quality parts was sort of short changing it IMO. If I was just running an everyday run of the mill stroker with cast internals and didn't plan to spin the hell out of it I would have probably gone 28oz. Internal balancing can get expensive depending on how many slugs of mallory need to be added.

For the intake I'd keep my eyes open for a used one. I just bought a holley myself for my car. I've seen them going for around $300-$400 used which is a lot better than buying new as long as there are no broken tabs or stripped out bolts.


The cam and supporting hardware will determine is this ends up being a 320rwhp stroker or a 400rwhp one. Make sure you choose your parts wisely and determine the RPM range you want BEFORE you buy anything or have anything assembled.


Good luck, I can't wait to see the results.

 

[WhiteDevil]

Yeah my builder milled out my stock 50oz flywheel to a 28oz. I used a FMS 28oz balancer. I will probably upgrade it later on though.

 

[stprorolla49]

The builder milled out my stock flywheel for $50. As for the balancer, you'll be fine with a Pro Products one. If you really want to spend some dough you can go with a Romac. They're worth the money but I don't think it's needed.

The reason i ask this is because im leaving my car together until the motor is 100% ready to drop in minus the front accessories, therefore im gonna probably end up getting a new flywheel to balance the rotating assembly.

Paul - Thanks so much for the link, im definately gonna check them out! If you dont mind shooting me a PM, if you could let me know some pricing examples for a scat 347 rotating assembly with a cast crank, 4340 rods, and forged pistons, and 185 heads, that would be awesome! I'm really looking forward to this build, its just gonna take me forever since im on a college budget haha...god dammit why does alcohol have to cost so much

 

[MattZ281LE]

My opinion is to have it internally balanced. Yeah its costs more but it is the best for RPM's and reducing damaging harmonics. I am using a Aluminum Romac balancer, dual keyed for my blower and a light billet steel flywheel. A good compromise.

Skys the limit.

Speed is a ? of money. How fast do you wanna go?

My stock Vics flowed pretty good 280/235 with alot of miles on them too. Lets see when Mr. Eades gets them back from the porter. he said to expect 315/250

I think Vics are a great head for the money. Good power box stock about, $1100.00 a set. The flow very well on the exh. side. I buddy of mine has a set of ported AFR 185's That flow as well on the Int. But still fall short on the exh. Now he has 2200.00 in his heads for what I had 1100.00. The AFR 205's are probably a bit better though.

AFR's are awesome box stock, my 165's rocked. But they are pricey...and I didn't like the fact they where not helicoiled

 

[stprorolla49]

My opinion is to have it internally balanced. Yeah its costs more but it is the best for RPM's and reducing damaging harmonics. I am using a Aluminum Romac balancer, dual keyed for my blower and a light billet steel flywheel. A good compromise.

Skys the limit.

Speed is a ? of money. How fast do you wanna go?

My stock Vics flowed pretty good 280/235 with alot of miles on them too. Lets see when Mr. Eades gets them back from the porter. he said to expect 315/250

I think Vics are a great head for the money. Good power box stock about, $1100.00 a set. The flow very well on the exh. side. I buddy of mine has a set of ported AFR 185's That flow as well on the Int. But still fall short on the exh. Now he has 2200.00 in his heads for what I had 1100.00. The AFR 205's are probably a bit better though.

AFR's are awesome box stock, my 165's rocked. But they are pricey...and I didn't like the fact they where not helicoiled

thanks for the info! to be honest, i dont think i need to have it internally balanced...this is gonna be a street motor with the occasional trip to the track, so i dont need some mondo motor....im looking for about 330-340hp and about 360-370 ft/lbs....does this seem reasonable with afr 185's, systemax intake, ots cam with about .510-.520 max lift, 75mm tb, 75mm mass air, and either 24 or 30 lb inj (not sure which is a better choice yet)?? im gonna be looking for a used intake and heads most likely, and would LOVE it if i could find someone elses project shortblock that they started and wanna get rid of....

also, with this combo, would i run 1.6 or 1.7 rockers? can someone please explain the pros and cons of both? thanks!

 

[final5-0]

Quite Honestly, the 1.7 or 1.72 is mainly a bolt on kinda thing mod.

Yes it gives you some more lift
but
When you get into building a motor ................
most builders and cam guys will tell you to go 1.6 simply because more cams are built for that ratio.

Grady