n20z28

iTrader: (3)

ive got a 01 ta a4 car going be a budget street car build...i have two cams in my shop right now... i am planning on running 1.85 rockers on which ever one i choose... which one u guys think will make more usable power and peak power? older comp 228/230 571/573 on 112 or tsp 233/239 595/605 on 112... the car will be weekend warrior i am using a lite ported ls6 head and bbk 85 intake...

TXZ28LS1

iTrader: (5)

I would go with the TSP 233/239. I have a 230 cam and it drives so much like stock. I am an auto also. I definitely could step up to a bigger cam. Go with the 233/239

180ls1

iTrader: (4)

233/239 and sell the rockers

danger ds

iTrader: (1)

^ right on the money

Whiteaw57

iTrader: (2)

1.85 baaaad, 1.7 gooooood, all the rockers do is change the cam characteristics but they do it at a terrible place (right over the valve) i.e. get a custom cam to do what you want with 1.7 rockers instead of changing all that geometry thats gonna wear that investment out in 10,000 miles

MYSTIC-1SC

iTrader: (14)

TSP 233/239 for sure.

n20z28

iTrader: (3)

will it not make more power doing 1.85 rockers... i read a deal for vengence or some one put 1.85 rocker on smaller cam like my 228/230 and made more power than a bigger cam with 1.7 rockers??

01ssreda4

iTrader: (96)

Rockers are no bueno. Sell em.

kinglt-1

iTrader: (26)

1.85 rockers are for someone looking to get a little more out of a stock cam only imo. You can get a custom grind designed for those rockers, but I would not put the 1.85's on either one of those cams you listed. As others already posted, your better off using the stock 1.7's(w/ trunion upgrade) and get the cam of your choice... preferably a custom grind and scratch both those you listed!!

n20z28

iTrader: (3)

If I went solid roller u think these would work fine? Cause I have another build I been thinkn of doin solid roller

LS1C5Vette

iTrader: (11)

233/239 112, 3200 or 3400 rpm stall, stock rockers. 1.85's w/ stock heads and the 233 cam you will have to flycut

PREDATOR-Z

Not necessarily.

Any case if he wishes to keep the rockers, then his 228/230 should be the choice. With the right springs, it will work.

n20z28

iTrader: (3)

i have aftermarket pistons

LTX355

iTrader: (15)

I have seen some top builds run rockers even the 1.85s but u need to use the best spring u can buy. The fast ramps on the xer lobes have never been recommended for higher ratio rockers because it causes the valve train to become easily unstable. A higher ratio rocker always amplifies what the cam is trying to do and if its already coming off the seat really fast rockers multiply it. A high end spring will help stabilize things...

PREDATOR-Z

228/230 .571/.573 112 is not a XER but a XE with variance rate of 53, the 1.85s will work if rest of valvetrain is set properly, and I stress PROPERLY.

kinglt-1

iTrader: (26)

ahh my bad, I thought the 228/230 was xer and thats why I posted no go w/ the 1.85's.

redtail2426

iTrader: (10)

What would the ramp rate be like if you used 1.8 rockers on the 228/230 Xe cam.Thats the cam i have and im curious.And what would it make my lift.Its 571/573 now??Would the ramp rate be comparable to a xer ,or even more aggressive?

kinglt-1

iTrader: (26)

predator z just posted the 1.8's will work with the xe 228/230...


here is his last post.

"228/230 .571/.573 112 is not a XER but a XE with variance rate of 53, the 1.85s will work if rest of valvetrain is set properly, and I stress PROPERLY"

LTX355

iTrader: (15)

Was referring to the bigger of the 2 that one does have xer lobes. None the less i second myself on having the best spring for this type of set up. xe like pred said should be fine as long as geometry is well done.

PREDATOR-Z

Keep the valvetrain as light as possible.