SBF limitations/info please
Page 1 of 3 • Share •
Page 1 of 3 • 1, 2, 3 
SBF limitations/info please
bb429power on February 18th 2011, 9:11 pm
Any clue on what a stock 68 302 bottom end will turn without throwing a rod? I've got this one to 6k as a shift point but I don't want to go higher really. Cam is supposed to go to 6500 but it seems to like the 5500 shift point. Just wondering how big of a cam I can go while keeping the stock bottom end. 
Not getting one soon, I just want to learn some SBF stuff as well.
Has 4v heads, any idea on the piston cc and chamber cc? Any help would be appreciated.
Not getting one soon, I just want to learn some SBF stuff as well.Has 4v heads, any idea on the piston cc and chamber cc? Any help would be appreciated.
bb429power- Posts: 2741
Join date: 2010-02-13
Age: 18
Location: Outskirts of Taylortucky Mi 
Re: SBF limitations/info please
bb429power on February 18th 2011, 9:34 pm
And whats the diameter of the balancer on one of these from the factory? 6 3/8"?
bb429power- Posts: 2741
Join date: 2010-02-13
Age: 18
Location: Outskirts of Taylortucky Mi -
Re: SBF limitations/info please
Maddmattmustangs on February 18th 2011, 10:08 pm
is your 302 a roller or non roller motor?
most 302 blocks spit down the lifter galley at about 550 horsepower. good rod bolts, good tune, probably would make 6500 rpm no biggie. although my "friends" here say you can hit 9,000 all day long
same people that talk about how a stock bottom 302 is the best motor to run 8's
most 302 blocks spit down the lifter galley at about 550 horsepower. good rod bolts, good tune, probably would make 6500 rpm no biggie. although my "friends" here say you can hit 9,000 all day long
same people that talk about how a stock bottom 302 is the best motor to run 8's
Maddmattmustangs- Posts: 1197
Join date: 2010-02-15
Age: 21
Location: Berryville, Arkansas -
Re: SBF limitations/info please
Diggindeeper on February 18th 2011, 10:31 pm
I threw a rod at a lot less than 6500 on one. If its used, you never know.
Had no tack, but with a 2bbl and a factory intake i'd doubt it'd even turn that high.
Had no tack, but with a 2bbl and a factory intake i'd doubt it'd even turn that high.
Diggindeeper- Posts: 689
Join date: 2009-08-06
Age: 31
Location: currently moving to swaggerville -
Re: SBF limitations/info please
bb429power on February 18th 2011, 10:34 pm
Well I may be building a 351w race motor for it. Enough to go 11's. There is a cam I was looking at that goes to 7k, just wanted to know about how stout the rods are on it because that's gonna be the first thing that breaks from the rpms.non roller but if I build the 351 that will be a roller. Two different engines all together though.
bb429power- Posts: 2741
Join date: 2010-02-13
Age: 18
Location: Outskirts of Taylortucky Mi -
Re: SBF limitations/info please
Maddmattmustangs on February 18th 2011, 10:50 pm
do a high reving 502 with TFS or SCJ's more bang for the buck
Maddmattmustangs- Posts: 1197
Join date: 2010-02-15
Age: 21
Location: Berryville, Arkansas -
Re: SBF limitations/info please
bb429power on February 18th 2011, 11:00 pm
Maddmattmustangs wrote:do a high reving 502 with TFS or SCJ's more bang for the buck
Getting machined rods, dome pistons, bullet roller cam and lifters, rings, and block...For $300 never installed. That's the only real reason we're planning on this other build. Plus my machinist has a crank.
Too good to pass it up, but down the road I want to do a full on race motor for it...BBF style... 
bb429power- Posts: 2741
Join date: 2010-02-13
Age: 18
Location: Outskirts of Taylortucky Mi -
Re: SBF limitations/info please
whatbumper on February 18th 2011, 11:12 pm
If this is for your maverick then a mild 302 will run mid 11's all day everyday. I had a little ole 306 with victor jr heads and intake, edelbrock 750 carb, a 290 duration 500 lift solid cam, 11.5:1 cr, old crappy mustang headers, c4 with good frictions and shift kit, art carr converter, and 4.86 gears, on a 28x10.5 tire. I shifted at 7000rpm but it had "good" rods. haha well, they were for the day.
Any street/strip sbf head on a pretty good short block will go 11's with ease.
a 68 block is really no different than any other 302 block except you can't run a roller cam without a kit. It will turn 6500-7000 just fine IF you can keep it out of detonation. most likely you will split the block before throwing a rod.
Any street/strip sbf head on a pretty good short block will go 11's with ease.
a 68 block is really no different than any other 302 block except you can't run a roller cam without a kit. It will turn 6500-7000 just fine IF you can keep it out of detonation. most likely you will split the block before throwing a rod.
whatbumper- Posts: 1762
Join date: 2009-11-11
Location: North DFW Texas -
Re: SBF limitations/info please
bb429power on February 18th 2011, 11:16 pm
whatbumper wrote:If this is for your maverick then a mild 302 will run mid 11's all day everyday. I had a little ole 306 with victor jr heads and intake, edelbrock 750 carb, a 290 duration 500 lift solid cam, 11.5:1 cr, old crappy mustang headers, c4 with good frictions and shift kit, art carr converter, and 4.86 gears, on a 28x10.5 tire. I shifted at 7000rpm but it had "good" rods. haha well, they were for the day.
Any street/strip sbf head on a pretty good short block will go 11's with ease.
Yep, for the mav. Need to figure out what heads, I thought about Victor Jr.s but my machinist has some that I want to find more out about. The rods he has are worked over stock rods like what my BBF has, what fuel did you run?
bb429power- Posts: 2741
Join date: 2010-02-13
Age: 18
Location: Outskirts of Taylortucky Mi -
Re: SBF limitations/info please
Maddmattmustangs on February 18th 2011, 11:22 pm
AFR makes some good 302/351W heads. 2 of my local pricks have them now, 185's of course
Maddmattmustangs- Posts: 1197
Join date: 2010-02-15
Age: 21
Location: Berryville, Arkansas -
Re: SBF limitations/info please
'65 T-BOLT on February 19th 2011, 12:11 am
weakest link in the sbf are the rod bolts....a 306 with ported 289 heads, victor jr, 750 dp, c4 3800 stall, 456 gears run mid to low 11's all day in a 65 falcon
'65 T-BOLT- Posts: 1409
Join date: 2009-08-28
Age: 41
Location: Hagerstown,Maryland -
Re: SBF limitations/info please
bb429power on February 19th 2011, 9:39 am
So lt me give you guys an idea of what its got now.
pertronix dist.
edelbrock performer rpm cam #7122
edelbrock regular performer rpm
edelbrock AVS 650 carb
iron 4v heads which I think are stock
stock style rockers
converter??? has to be a mild one, I'd have to check but I remember getting it up to 1500 at least 2500 ate the max without burning rubber
C4 with shift kit
8.8 rear w/ posi and 4.10 gears
Ran good...But then I got my hands on it
And now its running better than it ever has before. Got a 14.155 out of it, full interior and all steel...
pertronix dist.
edelbrock performer rpm cam #7122
edelbrock regular performer rpm
edelbrock AVS 650 carb
iron 4v heads which I think are stock
stock style rockers
converter??? has to be a mild one, I'd have to check but I remember getting it up to 1500 at least 2500 ate the max without burning rubber
C4 with shift kit
8.8 rear w/ posi and 4.10 gears
Ran good...But then I got my hands on it
And now its running better than it ever has before. Got a 14.155 out of it, full interior and all steel...
bb429power- Posts: 2741
Join date: 2010-02-13
Age: 18
Location: Outskirts of Taylortucky Mi -
Re: SBF limitations/info please
richter69 on February 19th 2011, 10:02 am
Our old 306 combo went 11.00's in the turd, stock bottom end 5.0 with arp rod bolts, hyper domes, solid ft cam, ported 70 351 heads........alky carb lol............spun it to 7000 on a regular basis.
The 5.0 block will split after a while, at that power level it took 300 or so passes.
The 5.0 block will split after a while, at that power level it took 300 or so passes.
richter69- Posts: 8199
Join date: 2008-12-02
Age: 41
Location: warmin' up my pimp hand -
Re: SBF limitations/info please
jbozzelle on February 19th 2011, 10:03 am
Good rod bolts and a good tune are the 2 best things. I had a 351 with a stock crank, Eagle rods, balanced, etc... It would routinely bump the 7800 chip in the lights. Crank and main caps looked fine when I pulled it down to sell it. The factory cranks are tough. A good balance job will help it live better up top.
jbozzelle- Posts: 2174
Join date: 2009-08-10
Age: 37
Location: New Orleans -
Re: SBF limitations/info please
bb429power on February 19th 2011, 10:05 am
That was with your brothers high winding sbf mustang right?
Well what do these guys do for a good block then? The guys running real fast, do they have aftermarket blocks? The 351 block is much stronger though correct?
We'll figure poout the fuel when it comes time for the bigger setup...
Well what do these guys do for a good block then? The guys running real fast, do they have aftermarket blocks? The 351 block is much stronger though correct?
We'll figure poout the fuel when it comes time for the bigger setup...
bb429power- Posts: 2741
Join date: 2010-02-13
Age: 18
Location: Outskirts of Taylortucky Mi -
Page 1 of 3 • 1, 2, 3
Page 1 of 3
Permissions in this forum:
You cannot reply to topics in this forum