kopbet89c4

I see there is a regular distributer on the back of the L98. On the LTx motors, the Opti-spark distributer is on the front of the block. So how are some people using a stock LT4 cam on their hyd roller L98??? Did they have to do something to the block or cam itself to get it to fit the late L98?? TIA

REDC4CORVETTE

Just cut the cam pin down in the front .

kopbet89c4

Is that all? It looks so simple. Hopefully it is that simple.

REDC4CORVETTE

Just make sure the cam plug is set at the right depth.
I don't know if your intake can handel the extra need for air with an LT1 cam?
Can't hurt to try.

rodj

Even though the LTX engines did not have a rear dizzy , the LTX cams have the drive gear just like a regular one.
The above mentioned isuse is the only matter for concern , hense the LT4 "Hot " cam in lottsa L98s.

kopbet89c4

Oh, my intake is a SuperRam intake and base. For that matter, I should be fine for now. I believe stock 113 heads flow up to .510 lift. In fact, everything should match accordingly.

mos90

your going to put a stock lt1 cam in a superram l98?

that is a waist of time.. duration at .050 and lift #'s are almost the same. you would not even notice a difference. id say 5hp gain. the only reason an lt1 made more hp than a l98 was that the heads flowed a hair better and different intake style, the cam played very little part.
if anything so with a zz4 cam or hotcam.

mos90

1996 lt4 cam is 203/210 @.050 .476/.480 with 1.6 rockers

1989 l98 cam is like 202/206 @.050 .423/423 lift with 1.5 rockers, or real close to that.

kopbet89c4

LT1 cam? Heck no!! I wanted to put a stock LT4 cam in.

mos90

yea i saw that ...

that is why i posted 96 lt4 cam #.. still to close to justify changing.. it is a solid 12-14 hour job to do a cam swap...

Nathan Plemons

Honestly the LT4 Cam isn't that much more aggressive than the stock LT1 cam. The power gain came from a combination of the 1.6 rockers and the better flowing heads.

The LTx Cam Specs are as follows:

'92_____205/207 .451/.450 117
'93-95__202/207 .450/.460 116
'96_____200/207 .447/.459 117
'96 LT4__203/210 .476/.479 115 (with 1.6 rocker)

So if you take away the 1.6 rockers you're left with

'96 LT4__203/210 .446/.449 115

As you can see the duration is only slightly higher than the LT1 on the exhaust side and the lift is actually LOWER. The tighter lobe sep will help some, but really it's marginal.

Compare these to the stock TPI cam and you'll see that it's probably not worth the hassle alone. Now if you already had the engine apart and you wanted to put it in there as a little boost while you had it apart, go for it. If you're planning on taking it apart just to put in this cam, don't waste the time or money.

kopbet89c4

Does the LT4 "hot cam" have these specs:

218/228, .472/.472 /w 1.5, 112 LSA?? Sounds nice but how are street manners and idle?? I'd rather not stall out at every traffic light if possible.

Red Tornado

you won't stall out, unless the tune is terrible. i have a LPE/Accel 219/219 cam with LPE/Accel full SR intake, and it provides a nice mild lope (noticeable with a 850 rpm idle, its a 6 speed) and runs pretty smooth thru 6000 rpms. The LT4 H.O.T. cam shouldn't be any different.

kopbet89c4

I see the hot cam (218/228) has more exhaust duration and about 0.030 less lift than a 219/219 cam. Does more exhaust duration decrease drivability vs. running more lift? What cam is better suited for 113 D-port heads, along with my current SRI intake base, runners and plenum?

cv67

Are your heads ported?

If they are stock, don't use a LT4 hotcam, you'll regret it.

Red Tornado

if you're running 113 heads, one good off-the-shelf choice is the LPE 211/219 cam which i one full step up in duration. i would not go higher than that. you should also complement this with an Accel base and AS&M large tube runners, and LT headers on exhaust.

rodj

"What cam is better suited for 113 D-port heads, along with my current SRI intake base, runners and plenum?"

As the man said above ,ZZ4 cam is a nice street cam.
With the 113 heads and a carb is factory rated at 355 Hp.
Have one in my stock L98 with LTs , great drivebility , nice idle and 13.1 in full street trim (3.07 , A4 ,freebie mods)
Highly recommend.

kopbet89c4

ZZ4 cam looks nice. Is that a 208/222 dur @ 0.050 and 474/510 /w 1.5, 112 LSA?? Looks like it is basically an L98 replacement, but only with a 750 cfm carb. 355 hp and 405 tq? That is more than I ask for now. I'm not sure if it will get me 355 hp just like that. I'll get Alvin to take care of that for me whenever I decide to swap. Thanks!

cv67

You said when you bought the car the former owner said it had a cam. Any idea which one?

kopbet89c4

My heads

I've had these heads on since March 2005, because the original ones were warped. They are stock and untouched.