HawaiianZ28Rider

i hav a stock 98 ls1 motor, iron block version


anybody know the best intake mainfold for gains on the dyno and street?

thanks experts,ryan

JoeyAnderson

iTrader: (20)

98 Iron Block? Interesting. What did it come out of? What displacement is it?

HawaiianZ28Rider

id tell u if you know how to find out, the guy i bought it off from told me it was the iron block and not the aluminum

300bhp/ton

are you sure it's a 98 and a LS1?

ALL Ls1's are aluminium, some people use the truck engine (same gen but different number) and these are generally 6.0 or are taken out to 408ci.

As for the intake, well I think you need to find out what you have to begin with then how much you want to spend.

If you do actually have a 1998 LS1 then it will have the LS1 intake.

The more you spend the more performance potential.

1. Stock LS1 intake and ported TB
2. Stock LS6 intake and ported TB
3. TPIS 90mm LS6 intake and 90mm TB
4. FAST 90mm intake & Nick Williams 90mm TB

However, the LS1 is actually pretty good and will match the LS6 upto about 5000rpm. A ported TB is a great idea and free if you do it yourself.

But in all honesty an intake change wouldn't be the first mod I do personally, have you done anything else to the car?

HawaiianZ28Rider

all the free mods stuff including porting, and yes its a 98 ls1 with the ls1 manifold

HawaiianZ28Rider

i hear the lsx is top of the line, but 770 for it....eff that man

HawaiianZ28Rider

yea the guy who sold it to me sed it was the iron block, where do i have to take pictures to verify this, he could be wrong but i just took in what he said

fast377

iTrader: (52)

On the rear driver's side bellhousing lip there is a laser etched number. That number will tell you what year it is and what it came out of. I forget the website that can decode it, but if you do a search on here you should find it. Also on the back of the block it should have 5.7 cast into it somewhere.

777

iTrader: (21)

I would think you could tell the difference between iron and aluminum.

As far as the ls6 intake not being much better than the ls1 except after 5000rpms. You may want to look at this. Albeit it has a cam and bolt-ons, but still. Looks like a good amount throughout the entire range.

WILWAXU

iTrader: (6)

Iron = 5.3 or 6.0 block.

If it does have a iron block, it's not stock.

Detroitmuscle

iTrader: (16)

The Ls6 intake manifold is what you will probably want to go with, that and a ported and polished stock throttle body. Unless you wanna go all out in the future ie. H/C or FI then you wan the FAST 90mm intake and NW 90mm TB.

TNTramair

iTrader: (15)

$740.00shipped from Byunspeed.....i just bought one.

300bhp/ton

Cheers an interesting graph (I stand corrected )

Although the LS1 isn't far behind it all the way up to about 4500rpm the it's game over.