[cadillac512]

We're drag racing a stock freshened '86 5.0 lower end with enough power to run high 11's.Trap rpm is 6600 and we shift at 6200.The rods are new stock rods and stock bolts from Ford.
What are the chances of keeping the rods in this thing for a full season? Anyone with experience please chime in.....

Terry

 

[tonys10sec306]

should have put arp rod bolts in. you would be safe for 7500 rpms for years!!!

 

[Is1BadFord]

My first two motors used stock 302 and 289 rods respectively. Those motors were both shifted at 7000rpm. The faster of the two (the 289) ran 12.20's on street tires. You should be ok. The 302 was TOTALLY stock but for a set of ported 351W heads, and a big solid flat tappet cam, and it never let go while I had it...the car got wrecked after 2 years, and I sold the motor.

Anyhow, good luck with your car!
Cris

 

[mavman]

You'll break the block before the rods. At least that's been my experience, FWIW.

 

[cadillac512]

Hey guys,thanks for the replies. Tony: Yep,should have put the ARP's in there but never expected this thing to run this well,LOL. Makes me feel better knowing you guys have run 'em hard with the stock stuff and had 'em live though.I'm not going to replace the rods this season unless there's trouble (cross fingers) but maybe next winter we'll look into it.I don't mind gambling a little bit as long as the odds aren't TOO lopsided. We'll chip it at 6800 and race it.

Thanks-
Terry

 

[gchero351]

6,600 rpm... I couldnt sleep at night. I'd get insured with a set of H-beams, but I admit i'm paranoid

 

[dfree383]

Spin It !! Factory rods are alot better than people will admitt !! Make sure its tuned right and no detonation (run good gas).

 

[brokenc6]

I used to shift my stock rodded 289 @ 7100 w/ very heavy forged TRW pistons. I had the low end ARP bolts. Upgrading the bolts can strengthen the rod as much as 50%. Rods recipicate putting much stress on the fasteners. I don't like to push stock rod bolts any further than need be.

 

[gchero351]

oh my god.... i aint gonna sleep tonight........ freekin' 7,100 rpm..... revvin' no respect....

 

[cadillac512]

LOL,yeah we're going to go ahead and spin it.(try to get some sleep,gchero351...you'll be too tired to RACE!). I agree with the thoughts on good bolts and wish that I had put 'em in there,but it's done and I have my fingers crossed and rev limiter set. The tune is spot on and the fuel is good with no sign of detonation. I know lots of guys have spun the heck out of 289/302's with stock rods.....hoping to join the "no problem" group myself. We will see! Thanks for all the advice-I appreciate it.

Terry

p.s.- If it scatters you can say you told me so,LOL.

 

[mrtbolt64]

289 stock rods/crank with heavy trw's 7600 on a regular basis. Just have faith. Now if it was an endurance motor that had to substain high RPM...............cover your head because sheet will hit the fan

 

[dfree383]

Lite That fuse !! LOL

 

[quickshift]

my 302 stretched rods @7000.........my 289 turns 9000 with stock rods BUT!!!!! check clearance &magnaflux before using......I think I`M just lucky.........or insane!

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<font size=-1>[ This Message was edited by: quickshift on 3/20/06 6:36am ]</font>

 

[thekingofazle]

Run it. No need for H-beams for a good long while. Its a marketing ploy just like the myth that you need aluminum heads to make power.