hopefully thats the case. i thought your average forged H-beam rods were only good for about 750-800... if thats the case, i want something with a little more head room...but, when i get time, ill give em a call, id like to order this puppy around august.

 

yeah that average rating for them is around there, but we all know sometimes things are underrated and overrated....from what I gather, the reason for using the 3.8xx crank size, is so that the internals being used will be thicker given the extra space, so whereas you sacrifice a few cubes vs. a 408 you get a lil more longevity, which is what I am after. High Numbers are great, and all, but I dont like feeling like I am walking on a tightrope.

 

makes sense. and i agree, i try not to push mine to redline very much, i usually shift around 6000rpm, my rev limiter is set at 6500, just kinda leary on this stock bottom, it has to last me another year. but i h ave a feeling the tranny or motor is gonna go this year...or the clutch...again. especially when it gets a few runs down the track....

 

It took 1900hp to bend a compstar H beam rod with twin turbo.

RPM is a factor in rating connecting rods too.

Fraser

 

Nothing wrong with that at all, we've gone 8.50 on a stock crank 370ci.

 

so your standard $3899 would be plenty for my power goals? i wont spin it past 6700rpm. lookin at 8-850rwhp. how much boost can a 4-stud per cylinder design handle before heads lift?? thanks

 

To answer this yes, but we're sold out of $3899 shortblocks.

1200hp (engine rated) is limit I've seen for 4 bolt

 

Is the 1200hp a number that is sustainable not just for a couple of dyno pulls?

 

when are you getting more in? im thinkin ill order one around august or so. and what about reliability? its mainly a street car...

 

Provided the rings keep tension and head gaskets don't leak, should be able to do it long as you have no issue with those.

I had one customer completely beat the crap out of his engine, 1150rwhp, highway raced every weekend 20+psi on E85. He called here about year later said he needed some new bearings, I was like damn, it lived that long.

Engine in Keith?

 

Should be able to have dragonslayer cranks in by then, dunno about other options at this time.

Reliability... bout as good as it gets, we built 48 390ci engines over the last 2 years, 1 came back, looked like it was detonated to ****

 

the $3899 doesn't include the dragon slayer crank though does it? Whats keeping you from getting blocks? You got interested customers waiting lol

i only drive my car on the weekends, and maybe to the track about 4 times a year. so hopefully it last quite awhile.

 

Engine is in, I've been putting some break in miles, taking care of stuff like front end alignment, checking for leaks and other stuff.

 

I might be totally wrong but my thinking is if you start with stronger parts then maybe you would need such as a higher end crank, rods and pistons it will give you some safety margin for KR or a lean condition. It doesn't take much for a boosted engine to have kr or a lean condition to some extent and that's possibly why only one has come back.

 

hey mike. how about some install/engine bay pics.

 

That price does not include dragonslayer crank

Blocks aren't my problem at this time, have plenty.
Can't get the c-series crank anymore, even dragonslayer cranks are hard to come by. I asked Callie's to make a regular Compstar 4340 3.75, 3.8, or 3.825, said fine give us an order for 100. Truth of the matter is you can use different stroke sizes with 1.180" compression height piston to get the same result. Nothing wrong with the piston being in the hole either, I'd actually prefer it.

I've talked to other crankshaft companies, see what happens.

 

ahhhhh i got ya now. well, is there any other options i could go with then through you guys? even if it were a few less cubes, id probably make the same power, just on more boost of course. I was dead set on your 390 this summer though.

 

Fraser what would your turn around time be on a 390 longblock (built for boost)
callies internals
dragonslayer crank
diamond pistons or cp pistons
billet rods
mast heads
I would like to keep it around 9.1 or about 9.5.1 compression.
I'm looking to make about 20-25 pounds of boost.

 

figured id toss some pics i took of my aes built 390 i received on April 20th




enjoy, I should have the motor and Procharger done within the next month maybe sooner
thanks Mike and Fraser.

 

1badss what rotating assembly do you go with?