I'm curious as to what the redline would be for a remanufactured 289 V8 with a hotter than stock (not too hot though) cam, stock heads, and stock bottom end. Right now I'm into the 13's with shift point being at 5500 RPM, but I don't want to be taking the motor that high if I shouldn't. Any thought?
Redline for 289 V8?
- Thread starter Mstng67289
- Start date
LMan
Founding Member
If by 'stock' you really mean stock, you wont get much if anything after 5500. No porting? Nothing?
I would not push it any higher with a stock bottom end, specifically the rod bolts (if they are really stock). They tend to fail catastrophically at higher RPMs/repeated abuse.
I would not push it any higher with a stock bottom end, specifically the rod bolts (if they are really stock). They tend to fail catastrophically at higher RPMs/repeated abuse.
Mods aren't extensive on the interior of the block. It's a remanufactured 289, so I'm guessing it's been bored maybe .01 over, just put a new edelborck performer intake on an a 570 cfm Holley street avenger carb on it, flowmaster duel exhaust w/ h-pipe, pertronix coil and ignition, and a hotter than stock cam was done by the previous owner. I can dip into the 13's by use of the T5(Z) tranny and 3.55 gears in the rear-end.
Should I get my heads modified to accept screw in studs and a good set of roller rockers? How about a girdle for the bottom end?
Should I get my heads modified to accept screw in studs and a good set of roller rockers? How about a girdle for the bottom end?
HistoricMustang
Active Member
I see not problem shifting at 6000. After that she will stop breathing.
Running at a constant 6000 is another story.
At the track I shift in the 6000 to 6200 range and run as high as 7000 for extended periods of time. This is a small block or as I like to say - a sewing machine and they can turn a lot of RPM's for short periods of time in stock form.
HistoricMustang
www.historicmustang.com
Running at a constant 6000 is another story.
At the track I shift in the 6000 to 6200 range and run as high as 7000 for extended periods of time. This is a small block or as I like to say - a sewing machine and they can turn a lot of RPM's for short periods of time in stock form.
HistoricMustang
www.historicmustang.com
I've turned a stock bottom ended 5.0 up to 7500 rpms, without problems. Only mod there was ARP rod bolts. And these were installed into the remanufactured ( $340 parts house specialMstng67289 said:
) short block after I brought it home. 6000-even 6500 shouldn't be a problem for a 289. Now as for sustained rpm's that's a different story with stock rod bolts.Yes the RPM range in question is a sustainable RPM. I could care less about short bursts.... what I'm worried about is taking it to the track and having to be able to sustain a high RPM and having a rod shoot out the side of the block or blow a main cap... or something else that shouldn't have gone wrong had I taken a lower RPM.
HistoricMustang
Active Member
Stuff happens when you push the limits.
If you are "worried" about the bad stuff taking place then perhaps a second thought about what you are undertaking.
Crap happens at the track or even on the "street".
If you do it enough something is going to give way. Perhaps the motor, perhaps you hitting something solid like a wall or guardrail.
HistoricMustang
www.historicmustang.com
If you are "worried" about the bad stuff taking place then perhaps a second thought about what you are undertaking.
Crap happens at the track or even on the "street".
If you do it enough something is going to give way. Perhaps the motor, perhaps you hitting something solid like a wall or guardrail.
HistoricMustang
www.historicmustang.com
brianj5600
Active Member
6500 should not be a problem for drag racing. Road racing is a different story. Since you are talking 13 sec, I'll ASS U ME that you are not going to be doing 30 minute sessions on a road course. I know that 5/16 rod bolts are small, but so is the stroke on a 289. I ran a 302 for a summer on the street and 2 or 3 trips to the strip a month with N2O shifting at 6500 w/o any problems. I have never heard of anyone breaking a rod, or block w/o a serious power adder.
When I say Sustainable RPM's , I'm referring to the type of rpm's that Historics car see's, on a road course or a circle track. Not drag racing where the motor just see's high rpms for very short periods of time. Your 289 isn't going to throw a rod or blow a main cap at 6500 rpm's, unless some nimrod who didn't know his ass from a hole in the ground assembled the motorMstng67289 said:
Similar threads
