1969x11

iTrader: (36)

will my stock pushrods hold up to a dual spring like comp 921s or do i need to upgrade? im installing a tsp 231/237

DONAIMIAN

iTrader: (18)

short answer: no

cyphur

iTrader: (10)

will it hold up? probably, for a few miles, until you decide to romp on it and then you bend the **** out of one, and maybe even **** up that pushrod slot.

you're spending ~500 on springs, but question getting better pushrods? doens't make much sense to me.

SouthFL.02.SS

TSP 231/237? You don't need Comp921's. Great upgrade, but Comp 918's do fine with that cam (I ran it like that no problems- no valve float). If you want a dual spring, get the PRC or Patriot Duals for much less money than 921's, and they're damn strong.

The TSP231/237 is on Lunati lobes that are less agressive than XE-R lobes, so despite the near .600 lift, the cam is not a spring killer.

As for hardened PR's. Yes, you need them.

By the way, that cam's a dog down low- you need gear (which I think you have). It lopes well though. Sounds mean.

What kind of spring do you have on the car right now?

SouthFL.02.SS

I just saw your other thread and you say you have springs good for .600 - those are fine. No need to swap them out for the 231/237.

Again, great peak HP cam, awesome mph at the track. Dog down low.

slow trap

iTrader: (22)

with the rpm it will take to make the 231/237 perform it's best a hardened pushrod should be mandatory.even with a missed gear on the stock rev-limiter some pushrods go south.

1969x11

iTrader: (36)

i thought my springs were good for .600 soo i called lunati and they said .570 on the part # i had.also what length pushrod do i need? best (cheapest) place to buy them?comp 918s or patriot gold with this cam? thanks again

SouthFL.02.SS

Texas Speed & Performance has awesome prices on PRC duals. 7.4" pushrod length is what you need. You can either keep stocker retainers or opt for the titanium retainers, or get Comp steel retainers, or re-use whatever you've got, which has got me thinking.... find out what O.D. your Lunati springs are. If they're wider than stock, your head has probably been worked to seat them. You'll have to find similar O.D. springs or get shims to use stock O.D. springs if this is the case.

As for the cam, I trapped 118mph, cam only, full weight, daily driven tire with the 231/237. It hauls ***. Great upper mid range and top end. I wound mine out till 6900rpm. Later, with heads and QTP HVMC LT's and FAST90, the car put down 480rwhp, so that cam has lots to give.

1969x11

iTrader: (36)

The springs ihave are stock o.d. with tianium retainers,so i should be able to reuse these.Iwill call TSP next week about the springs and pushrods.BTW.YOU HAVE BEEN ALOT OF HELP!!!THANKS.

SouthFL.02.SS

^ If your heads are milled any, check PTV and perhaps 7.35" PR's are the better choice. Bring this up with TSP when you call them. If not milled, 7.4" PR's and PTV should be plenty fine.

Rebelord

iTrader: (2)

BTW, TSP is running a special for the PRCS and there hardend P/Rs for cheap. Give them a call. Plus, mention the new site and you get $10off.

Ski

93octane

The 231/237 is a great cam for "roll" racing and high speeds. I run 3.42's and tuning and the car runs great, just wish I had more low end power. Have fun with the cam. If you don't have true duals, you'll want them with this cam. The cam sounds mean!