Would it be worthwhile upgrading to beefier main caps like in the Dart block? What are the limits of the stock mains? What is the weak link in the stock bottom end after rods & pistons are addressed? Thanks in advance...

 

I have had motors handle around 500hp

 

Cheese you just wanna waste money? ive seen 630 on STOCK MAINS! OMG! lol no really, are there limits to the stock main caps? wheres Radioshack? i mean Tony1.

 

I think most crank flex could be addressed with a Beefier Girdle...Something that supported all 5 Mains and tied them into block somehow.

Suprdave

 

All of our cars are run stock mains and we haven't had a problem yet (keeping fingers crossed)... Time for a new 1000whp B series street motor Cary?

 

Don't worry about the mains! If it's built right then there won't be any problems!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Don't worry about the mains! If it's built right then there won't be any problems!</TD></TR></TABLE>

do you see any need for a girdle that incorporates all 5 mains?

 

Only reason I say don't worry about it is because i've built and seen alot of high hp hondas and i've never heard of a main problem. If it ain't broke...

We ran Kenny's car all year with stock gsr bearings and only the stock gsr girdle. On paper, yes, a girdle that goes on all 5 mains would be better, but i have yet to see the need for one. Honda guys are lucky, these motors are so well engineered and they're pretty simple to get them to hold 800+hp.

 

thats good to know

 

wow tony are you saying that toyota guys are not lucky?? how much worst or better is that toyota motor that you guys are using. how about a quick comparision. pro's n con's.???

 

I guess its pretty understandable that everyone replaces the bolts though. Im gonna use the AEBS studs to match whats up top holding the head down.

 

I think the 3rz motor that we're running is way better than a b series motor. It's a cast iron solid deck block (can you say Supra strong?!), it's square (96mm x 96mm), it's got great valve angles on the head, and it's big - 2.7L. Being square it'll still rev and make power to 10k+. The only downside is that the shims under the buckets like to pop out when you rev them high, but we've got that all taken care of. The girdle on our motor is just insurance, we plan to make well over 1000hp! Oh, and just a note, we used stock main bolts on kenny's motors...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93LSivic &raquo;</TD></TR><TR><TD CLASS="quote">I guess its pretty understandable that everyone replaces the bolts though. Im gonna use the AEBS studs to match whats up top holding the head down.</TD></TR></TABLE>

just like tony1 say's you will be fine and using the AEBS is a good call also

 

honda mains are all pretty good even without the gridle seems to me that alot of peps are making good #s with them and hold up to the abuse

 

pretty sure Endyn makes a 5 cap girdle.

 

so is a replace girdle liek the one that z10 has availible even worth the extra money?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rtype11 &raquo;</TD></TR><TR><TD CLASS="quote">pretty sure Endyn makes a 5 cap girdle.</TD></TR></TABLE>
Its only 3 main girdle. If you think about it you only need it on those 3.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93LSivic &raquo;</TD></TR><TR><TD CLASS="quote">I guess its pretty understandable that everyone replaces the bolts though. Im gonna use the AEBS studs to match whats up top holding the head down.</TD></TR></TABLE>

Do the majority of the higher-hp cars upgrade the bolts? At what point would this be recommended?

 

thats interesting.. what other motors are perfect squares like that?? i had never herd of that... so what toyotas have this motor??

 

My stock main caps handle 600whp no prob stock girdle.

 

The 3RZ is from the 4 cyl. tacoma, oddly enough! I believe the K motors are square, right?

 

The stock K series are incredible with a complete 5 main girdle \ halo . I think the problem is that you should check or relpace the bearings about every 10 runs. If your at the 900-1050hp mark. Z10 also makes a five main that is sick. The reason I say that is because the bearings just aren't wide enough.

 

Why would you replace bearings that aren't bad? If your clearances are right and you aren't having any detonation...you shouldn't have much bearing wear.

Suprdave

 

Note I said check or replace bearings. I also explained that there just isn't enough bearing surface to disperse the load whether you have the best balanced \ tuned engine in the world. Meaning that there isn't enough oil pressure or correct clearance that could ever stop that crank ,after that type of explosion from coming down and tapping the bearing.