Thread: Con rod Bolts upgrade on 2F

Trust me... if you count on that... you will quickly collect a few dead 3F engines. Mark...

Marshall , FWIW I have decided not to increase duration and lift in the cam . It is going to a cam grinder that is going to make the torque curve come in a bit later but it will last over a longer rpm band - or that is how he explained it to me . It is a bit of a compromise but how I prefer it . The ARP bolts for a Supra has been ordered ( so my question has been answered ) . That is probably overkill in my case - but it is a rebuild and I...

Neat, I'll have to "look" myself if we are out snow-wheeling this winter.

Quote: Originally Posted by pappy Aaron is correct. Directly from the 1988 Model New Car Features, Land Cruiser , page 138 - " 8b. Fuel Cut-off Due to High Engine Speed. To prevent engine over-run, fuel injection is cut if engine speed rises above 5000rpm. Fuel injection is resumed when the engine speed falls below this value." I need to print this and hang it on the refrigerator for the wife to see Thanks!!!!

Quote: Originally Posted by Mark W I have taken 3 different 3FEs in FJ62s past 5000 a few times each. I have busted pistons in two different 3FEs taking them up around 5500. I do not push the 3F engines past 5000 any more. Mark... Dang short rod/stroke ratio. When I looked at (and quickly abadonded) trying to stroke a 3FE I thought that this was a 3FE quirk (some sort of money saving idea to simply destroke the 2F). Then I started noticing...

From the dyno runs I have done with my 2f with the rv cam the max torque is around 2400 rpms. Max HP is around 3600. After that it fall like a rock at 4200 rpms for hp and around 3600 for torque. Would be interesting to see what a stock cam would look like. I'm betting the numbers would be better. My question is wouldn't it be better to stay within the max torque/hp numbers? I understand for sand that may not be possible.

Quote: Originally Posted by tonkota I need to print this and hang it on the refrigerator for the wife to see Thanks!!!! that fuel cut off could turn to a sex cut off if rubbed in her face you were right about something to much...

Quote: Originally Posted by Yspen Impossible to shift gears in the dunes . As soon as you hit the clutch to shift the car comes to a immediate stop and all momentum is lost . You need high revs in the dunes . But in principle I agree with Marshall - I feel uncomfortable above 3500 rpms . I have some experience in sand, but am not a core wheeler so take my advice with a grain of it; why not just run a cam that offers power +/- 500 rpm of 3500?

2" Body lift in an 60 or 80 for a guess would be close.

MSD makes a nice rev limiter as well