302 blocks are they all the same?

[Jeepster]

Are all 302 blocks created equal?

Can a 77 block with the right parts

be made equal to say a 85 mustang 5.0 (3o2)(carb)?

 

[wildbill]

;D ;D ;D Yes its on how you build it what you want the motor to do if you want all the power on the bottom or top. You need to look at cam's and intake's and carb. cfm and put it together the way you want it to work good RV cam ect (erson) about 600 cfm carb duel plain intake small tup headers makes a lot of low end power and even better in a 351W good luck with your choice.%) %) %) Bill %)

 

[ken75ranger]

The blocks themselves aren't different. As Bill said it's how it's built. Another thing to keep an eye on what heads your going to use.

 

[Synds9]

isn't the boss 302 different as far as where the cooling runs so it can accept 351c heads?

 

[cjjhalfcab]

Other than the rollers and Boss302 block, the only other one I can think of that's at all different are the Mexican 302s that have beefier main webbing.

 

[trailpsycho]

Are not roller blocks set up a bit different than a flat tappet cam block? I have always heard people mentioning that you can retrofit a say 76 block to change it over to a roller cam, etc but that the cost was in machining, which would mean there are some small internal differences, right? Or am I way off? The benefit of the roller cam is a 20-25 hp gain versus a flat tappet cam due to a decrease in internal friction.....

 

[wildbill]

;D ;D ;D The boss 302 heads are different in the water ports than the 351C motor. The boss and the reg. 302 have the same typ water ports. And if you want to run 351C heads on a stock 302 you can get the head gaskit and drill the head and bolt it on a stock 302 and get a special intake.;D ;D ;D Bill %)

 

[Jeepster]

Are not roller blocks set up a bit different than a flat tappet cam block? I have always heard people mentioning that you can retrofit a say 76 block to change it over to a roller cam, etc but that the cost was in machining, which would mean there are some small internal differences, right? Or am I way off? The benefit of the roller cam is a 20-25 hp gain versus a flat tappet cam due to a decrease in internal friction.....

This is what I want to know Old block vs new vs $ to make =.

Another factor: Seeing both would have to be rebuilt (both being unknown)

Rotties mentioned in another post that some of the roller stuff could be reused.

 

[2badrotties]

The difference in the blocks is this.

Newer roller cam block - Well you know the lifter bores are taller for the roller lifters, there are threaded holes in the lifter valley for the retainers for the roller lifters, one piece rear main seal ( less prone to leak ) , weight - they weigh about 25 lbs less than a older block. Thinner structure but I believe they are a truer block than the older ones as far as core shift and such. The pistons are MUCH BETTER than the older cast pistons ( skirts less likely to break ). Roller lifters can be reused, pushrods made of much stronger material.

You can retrofit a hydraulic roller into a older block but the cost of the kit is more than buying a roller cam engine core.

 

[ken75ranger]

Just out of curiosity. What are the benefits of a roller motor to guys like us (lower rev. and high torque)? I know the valve train won't work as hard. Anything else?

 

[Jeepster]

can a EFI motor run a carb?

 

[stevew]

" Can a EFI motor run a carb " ? Absolutely ! I took an '89 long block ( 302) , put a Edelbrock Performer 298 intake on it , Edelbrock Performer 500 cfm carb , Hedman Hedders , all the stock '70 302 accessories bolt right on . All I did was port the stink out of the heads & it ran like an animal ! The later 302 heads have a much better valve train than the earlier ones too . That motor made so much power it was scary !
Oh yeah ... I forgot . This was an F 150 non-roller motor .

 

[2badrotties]

Just out of curiosity. What are the benefits of a roller motor to guys like us (lower rev. and high torque)? I know the valve train won't work as hard. Anything else?

The benefits are low friction. Roller cam = low friction, low tension rings = low friction, much stronger pistons. Every time you reduce friction at any rpm , you increase hp and milage.

 

[psbronco]

Rollers

Does anyone know what years and models to look for roller motor donar's??