H rod bearings
- Thread starter Toxic
- Start date
Normal.
What kind of hp are we shooting for and whats the truck being used for?
What kind of hp are we shooting for and whats the truck being used for?
Just a street truck. Callie’s crank, rods and stage 2af cam. Fingers cast ovals. Manton top end. Stock injectors with a10mm cp3. Single 472. Dhd trans with a J.
So the width difference is normal?
So the width difference is normal?
You would have been just fine on stock or P bearings.
I dont know that the width difference is normal. Your mixing bearings so who knows.
I dont know that the width difference is normal. Your mixing bearings so who knows.
P bearings had .0022 clearance. The hx was .004 and the h/hx combo is .0026. Think Monday I will give SoCal a call and see what they say. Was told the hx from them were clevite also, but the machine shop said they were some off brand he never heard of. But idk if that’s just cause they came in a SoCal package and not a clevite.
Eventually I plan on 100-150% injectors and a 14mm cp3. And maybe a bigger single at that time or shortly after.
Your crank will be an issue before the bearings will be if you go with the softer P’s. Its not like they “squish out” and deform at the levels your after.
Theres no way the P’s will be .0022 in every rod of yours. That clearance changes/is different in every rod even after “sized”. Thats why most builders have additional bearings than just a standard pack. You can get .0015 on one rod and .0028 on the next. Sometimes swapping the tightest with the loosest negates that issue. Just depends. Same goes for the HX. Most of those ive done come out in the .003+ range.
What are you doing on your mains?
You are putting alot of money into that engine. Running miss matches bearings does not give me the warm and fuzzies. May not be an issue, may be an issue. Worth that risk? I’d either hold out for H’s or run P’s.
Theres no way the P’s will be .0022 in every rod of yours. That clearance changes/is different in every rod even after “sized”. Thats why most builders have additional bearings than just a standard pack. You can get .0015 on one rod and .0028 on the next. Sometimes swapping the tightest with the loosest negates that issue. Just depends. Same goes for the HX. Most of those ive done come out in the .003+ range.
What are you doing on your mains?
You are putting alot of money into that engine. Running miss matches bearings does not give me the warm and fuzzies. May not be an issue, may be an issue. Worth that risk? I’d either hold out for H’s or run P’s.
I have a full set of p, h and hx. Last I knew guy at SoCal mixed h and hx often to get proper clearances. Have h main bearings, believe he said they were .003. Have SoCal billet main caps.
Apparently the hx I got from Dhd that came from SoCal were kings according to the machine shop. He sourced some clevite hx and with those I’m at .0029, mixed with the clevite h I’m at .0024. The king hx were .0034. Probably just gonna run the clevite hx. Or should I mix the clevite h and hx?
Mixing H bearings and HX is common practice (in race engine world) to obtain proper clearance.
I sure wouldn't mix one brand with another.
I sure wouldn't mix one brand with another.
My engine is mixed rod bearings (H/HX).
So would you guys say .0024 or .0029 for the rod clearance?
.0024.
Whats ALL your bearing clearances for rods?
Whats ALL your bearing clearances for rods?
Not sure, machine shop still has everything. Has .0024 wrote on the invoice with the clevite h/hx mix. And .0029 with the clevite hx.
Probably averaged. Whats the clearances on the mains?
Average of .0031. Rings are .023, .025, .015