i have a set of buddy club spec 4's i want to know how far you can take them before they fall off?

 

depends................

YOU HAVE PROVIDED NO DETAILS

Check the dyno thread

 

I would say you can push the cam off the edge of the table until 1/2 of the cam shaft is off the table; then expect it to fall off the table onto the ground.

 

This, lol. But really, no engine info what so ever?!

 

my bad!!! i'm still learning... but here you go!

b16a head.
rc 310 injectors
port&polished.
buddyclub spec 4 cams.
buddyclub retainers.
buddyclub valve springs.
skunk2 camgears.
hytech replica header
itr manifold/ str 68mm TB
hondata manifold gasket
b18c1 block
ls crank
eagle rods and rod bolts
ctr pistons
ys1 tranny

 

BS.......

You have 2 things that dont work together

 

Honestly, these are High RPM usability cams of over 250whp potential. You don't have enough injector, Hytech header may help, but they like long runner high rpm-styled headers to work. CTR pistons WILL cause some piston/valve clearance issues, as they are pretty aggressive, especially on an LS crank. I'd clay the engine before using this combination, as it is physically risky, especially at 13.0:1 (estimated static compression).

This doesn't seem to be a practical approach.

 

my car is already running like that and has been....
i still need a tune!

 

what do you mean?

 

Help us alittle bit..


You ask what the limits of these cams are, and you're running the setup you listed above, untuned?

Are the BC4's in the car currently.. please say no..

Next, this is what i was afraid of..ctr's stick out of the hole ~0.005" on a untouched block..even with a 3layer HG, it still wont be enough clearence..

 

that's how it was built... it's not running now. but it was before, i need a new starter
but other than that no problems what so ever and yes the cams have been in the car and if i shouldn't be running these pistons, cause i know there heavy as f*ck. what pistons should i run and what comp ratio would be suitable for the cams?

 

Piston weight isn't even the full problem. I dont wanna start a pissing contest with anyone.


You need to do alittle researching, and understand how it isn't going to work.

They aren't a "HUGE" cam, but they are fairly big, I'd recommend at least a 12.0CR for them. Dont run the car untuned, it's asking for trouble as your CR is close to 13 as it is now, and we dont know if the block has been decked and the head milled.

If you're looking to stick with cast pistons
RS
P30 or pr3's

If you're going to go forged route, CP's and weisco's are fairly cheap.

 

manley pistons and supertech are cheaper...and manleys are very good quality...supertech i have no experience with...

 

What is wrong with CTR pistons in this combo? Isn't the B18a/b deck height slightly shorter than a B18c deck? If that's the case piston to deck height is worse on a B18c block, crank and rods and we know that works just fine.

 

compression will be higher on b18b than b18c with ctrs cause pistons stick out more..

 

ls deck height is - 211
GSR is - 212

You're not accouting for the stroke or rod length though.

ls rod -137
gsr rod - 137.90

With a ls crank you're doing 89mm vs 87.2mm

Piston to deck as the car sits is at like .0006'' not enough.. Yes, we've seen mikey's thread, for God sakes this is a completely different animal.. this isn't a gsr with ctr pistons, its a gsr with a ls crank and ctr pistons.

 

This almost Suicidal

 

I was not taking into account the rod length, didn't realize they were that close to each other. I guess the B18a/b piston wrist pin sits a little higher than gsr/itr pistons?

 

check the faq those cams made 247 on a 2l setup...on the skunk2 stg 3 vs bc4 thread..

 

Yeah I've seen those cams make great power. Jason Lumpkin runs 10's with BC4's in his drag crx

 

I'd LOVE to know how you got CTR pistons on eagle rods..... No one else caught that?

 

This was the other thing i was going to refer to, however i was too busy discussing how far they stick out, but NA, here is right..

 

Yeah noticed that too. I have a feeling this guy doesn't even know what he really has.

 

haha. damn! damn that's some good power for bc4's

 

haha. i know that! but just in general the pistons are heavy. when there's pistons out there that are lighter and made of better quality... when i bought this car, it came how it was... it had no injectors and was running on a stock p28 ecu it was pretty ****ed up and also instead of using the fork spring it was mickey moused with a piece of wire... dumbasses who put the car together... now! it's time to rebuild and get some good advice on parts that will make a good combination with this motor

p.s. since i have an ls crank! what piston comp ratio should i run?