hey guys im looking into doing a new set up for my car, i was just wondering how many people out there are running a 370 iron ls1 block? if so can anyone give me any input on how the car likes the increase cubes. i currently have just installed a new t-56 and MOSER 9 on the car. and i figured the next step would be to go with the motor. i want to keep the car an ls1 mean NO LS2, im trying to keep the car on a budget.

what kinda power are you guys making with 370?

or even what kinda power are you guys making with spray?

what size cams are you guys running currently im running the ms3 in my 346 id like to run the ms4 in the 370. i've just had really good experiences with these cams and plan on sticking with them

any input would help me out let me know what you guys think of these blocks.... for what its worth i'll probably be going with Texas Speed & Performance because the have a great deal with the 370

 

370s can make great power but it really depends what head and cam package you go with. With your drivetrain the car won't be much of a dyno queen, but it should run pretty well at the track. Have you considered a 408 c.i motor? If it is in your budget I definately think it would be a good idea to look at one. The stroker motors provide much more torque and power in early RPMs than stock stroke motors do. In my opinion they are one of the better bang for your buck motors available.

 

its nothing against the ls2 motors but im just not seeing how its going to be cheaper to run that instead of an ls1 based motor, with the 370 i wont have to get the ls2 conversion kit.
i can just have the 5.3's i have be ported and put new springs on

 

The iron 408 uses the same block as the iron 370, no LS2 conversion kit needed.

 

So how does the extra ~80 pounds of the LQ9 affect non-straightline performance? 80 pounds really doesn't seem like much to me, but I am not well versed in these things.

 

80 pounds on the nose is a lot, but you can remove the sway bar, and go to a k-member set up and almost be back to the stock weight.

if you are making the power you want the 80 pounds won't bother you as there are a lot of 408's running around.

 

so what exactly do you need to install the 408? i was told you had to run a conversion kit, which is an extra couple hundred. a 370 i can pick up for a 3grand and some change.

 

I see 408s starting at like 3800, when i see 370s starting at 2900. i can run my current heads and cam set up just maybe get newer heads and increase my nitrous shot thats what my original plans were.

 

if u went with a 408 LS2 than yes you would need the kit. but if u go with a 408 iron lq4/lq9 block than u would just bolt it in as u would the 370 iron block. and if u r gonna spend 3k i would def go with the 408.

 

Its true that there is an upgrade price between the two because of the stroker crank. But like I posted before its definately worth the money. There would be no extra conversion kit needed with the iron block, just bolt it in move your accessories over and go. I am not saying you have to go with it, just a mere suggestion.

 

I would go with the 408 ci. You will get alot more power down low. The price increase is not enough to sway me IMO.

 

it's actually closer to 110lbs

 

Its like a skinny Hooters girl on the hood while driving. I honestly don't think it is gonna affect the acceleration/cornering of the car, unless you are racing in the twisties all the time.

 

It absolutely will affect the car. But a normal driver won't notice the difference. If you do road courses, drive hard as hell on the street, drag all the time, you'll notice it.

 

see i have a 5k max on my next motor build including touching up the heads i already have, running a bigger cam and a 370 i can do all that for under 5k.. with a 408 id have to run different heads and then get a different intake

 

I run an iron 370 in my car.....12:1 compression with PRC 5.3 heads, big custom cam (24x/25x), and ported 92/92. It makes ~500/450 on motor through a t56, 3" steel drive shaft and 9"/4.33's. I usually trap 123-124 mph on motor with a 3900lb race weight. On a mild nitrous hit I trap 135ish.
The reason I built a 370 instead of a 408 is because when I built my motor the cheapest forged 4" cranks were over $1k and coming from SBC land, that was ruh-tarded to me. So I kept the stock stroke and put the $1k I saved into the nitrous system. Crank prices have since dropped to sane levels, and if I were building the my motor today I'd for sure do the 408.

 

i'd love to have a 408 but what kinda prices are we talking

 

your current heads and intake will work with a 408.

 

Here is a price on our base package 408. With the -8cc pistons you would have a nice compression ratio for a street motor. In this form it would be good for a 200 shot, if you threw in an ARP main stud kit it would be able to handle more than that no issue.

 

well jon ive done alot of thinking, since i will be coming across alittle more money than i thought. can you give me any info on you guys l92 427?