alright imb building an ls vtec and my bottom end consits of stock ls rods milled to fit type r pistons and then re shot peened with arp rod bolts a gsr crank girdle align honed and machined down to correct clearences also arp main studs itr oil pump


im running toda spec b cams and they make power to 9k and id hate to be missing out on power lol


the car is going to be a daily driver so i want to make sure its gonna be safe and no its not gonna see 9k every day

 

i would think soo...........but, i would keep it safe and run it to about 8700 just soo u dont find out the hard way if it will make it to 9k.......

 

thanks for your advice

 

you should be good.. but id invest in some eagle rods or something alittle stronger that just shotpeened ls rods.. what happen to the all motor ls build?

 

I don't think the spec Bs peak that high. Maybe 8-8500.

 

ive got a dyno chart of them making power to 9k in the previous owner of the cams jdm itr motor

 

cams will make power at different peaks with different flow rates and so forth, it all makes a difference, a 2 liter will peak before your motor will just from the extra displacement. Atleast i think this is right, someone correct me if i am wrong.

 

correct, its not just about engine size.. its piston speed as well. a 89mm crank with stock ls rods should peak sooner than a 87mmm gs-r crank and gs-r rods GIVEN they are the same displacement.

 

it also has alot to do with the type of bolt ons your using .... when my boy had spec b's and just a stock itr mani and itr tb he peaked at around 8600 or so..... when he bored out to 70mm and went with the aebs intake mani and 3" intake he was peaking at over 9000 rmps ....

im planning on building a very similar motor.. ls vtec, but i am going to be concentrating on moving my power in sooner in the rmps by just using a stock itr intake mani and tb... i think ill also use the mighty mid range skunk2 pro 1's as well....... but spec b's are sicg, expecialy in the midrange.. primarys are pretty big

 

i have an aens typhoon and edelbrock 65mm tb i guess ill just hope it peaks around 8500 or so i dont want to be risky and go to 9k

 

LS shotpeened rods with CTR's, resized with ARP rod botls = 8.6k for 2k miles for me. no problems.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dohcter g &raquo;</TD></TR><TR><TD CLASS="quote">LS shotpeened rods with CTR's, resized with ARP rod botls = 8.6k for 2k miles for me. no problems.</TD></TR></TABLE>


and do you have arp mainstuds and a girdle to or just arp rod bolts and shotpeened ls rods

i should be fine then

 

ARP rod bolts and Head studs, every other fastener is stock!

 

lol i just accidentally revved my motor to 9k today too. All i got is shot peened rods, not even arp rod bolts. Luckily i got upgraded valvetrain, and my rod bolts didn't stretch or snap. I'm not saying it should hold up, just saying that i made it . Also get your rods notched so you can use gsr bearings.