has anyone used an S372 .90ar on a b18 with 81 or 82mm bore
car has antilag and will be used on the strip. i know its a overkill for an 1800cc but its in prep. for my new 85mm bored block

need your insights turbodano, shodan

 

There are several people running the S372 on the B18. I think CFT and T1 are running it on a B18. They work very well.

 

It shouldnt be a problem. I say go for it since you are building another block.I will be using a PT74 on my 1.8 lsvtec this year. I even had excellent result with the t4/t67 on my old setup(b18b).

 

When you say B18 do you mean an A,B,C which model?

i think on a straight non-vtec motor working an s372 very well will be hard, the non vtec motor just comes no where close to flowing like a vtec motor and in order to rev it, you need to prep the head really well.

they toss the rocker arm pads, at usually anything much over 8K, i see you needing to rev that motor out a tad more in order to effectively get "good" power form that large of a turbo

 

The S372 is a pretty big monster, and is, from what I understand the limit of the size that is allowed in NHRA. I've used a couple of them on some hondas, and work quite well, though they were all VTEC engines. Displacement from 2.0litres and under for such a large unit didn't factor into "spool" times, (meaning that it didn't matter if you have 82mm or 85mm bore) because the difference in exhaust energy between cylinder bores needed to move the turbo is negligable. It would help if you state which B-series engine that you have, and what power you're going to use with it.

 

we sold a S372 to a customer who used it on a straight LS motor.....i dont remember any of the numbers or times, but i know he ran some impressive track times with it with some good mph.

for 99% of the people running LS motors, there is probably a turbo that would be better suited for the application.....

 

thank you for the inputs

current engine is a b18c5 with 89mm LS crank, 82mm arias pistons, new ported vtec head built with supertech valvetrain valves and keepers, b16b cams

aiming to go 700whp on the b18 82mm and 850whp on the 85mm motor

 

that hp level is very easily obtainable with that setup.

 

whats the difference in the build on the 82 and the 85mm? if you have good parts in it, your 82mm motor can meet your goals of the 85mm....

 

82mm stock sleeves, 85mm GE sleeved

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18s372 &raquo;</TD></TR><TR><TD CLASS="quote">82mm stock sleeves, 85mm GE sleeved</TD></TR></TABLE>

You went to 82mm on stock sleeves and you want 700whp out of it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by champLSinteg &raquo;</TD></TR><TR><TD CLASS="quote">

You went to 82mm on stock sleeves and you want 700whp out of it? </TD></TR></TABLE>

This is what I'm interpreting as well. For EITHER of these HP levels, sleeving the block is a requirement.

 

yes i am aware of this thats why i have a sleeved block waiting.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18s372 &raquo;</TD></TR><TR><TD CLASS="quote">

aiming to go 700whp on the b18 82mm and 850whp on the 85mm motor

</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18s372 &raquo;</TD></TR><TR><TD CLASS="quote">yes i am aware of this thats why i have a sleeved block waiting. </TD></TR></TABLE>

I would not waste my time with the 1.8 if thats the case because you'll be lucky if it even makes if off the dyno. Sell it to someone to do an N/A build.

 

b18 82mm block is going to stay on the steel body. 85mm sleeved engine will be going to a purpose built drag car. we just want to try out the s372 before it goes in the new car we have seen gt40's here in the UAE making 650whp on stock sleeves

 

if you where in my shoes how far will you go on 82mm w/out sleeves??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18s372 &raquo;</TD></TR><TR><TD CLASS="quote">if you where in my shoes how far will you go on 82mm w/out sleeves?? </TD></TR></TABLE>

250whp N/A...

I would not want to destroy a block that you can still get use out of by boosting on it.

 

what are you planing on reving too? i have the 471/.90 ar which is now the 372 w/83mm turbine wheel and i see full bout 6000rpm and shift bout 8800rpm on a built h22 but i like to see how it works on the street car on the smaller motor

 

See, I guess that's the thing. we're not in your shoes. we don't know what your budget is. Can you afford to deal with ultimate engine failure? Do you have the resources of several engine blocks? Do you even care? What's more important to you, low budget, or reliable and repeatable results?

For most of us here, including myself, would say just sleeve the block and do it right the first time, especially when that the power goal that you have is clear. Hopefully, as a knowledgeable person you already know that the sleeves can only take so much, no one truly knows the actual "hp level" that they will fail, but that they WILL FAIL. But its your money, your time and your budget. How risk averse you are in regards to this build, only you know, so asking us to decide for you is a silly point.

 

your insights are appreciated

looks like an s366 is going in to the 82mm motor and remain on the 520++ whp range as before (which has been running for more than a year now on stock sleeves) and if your wondering why a lot of people here run stock sleeves is that most of the shops that install sleeves here had sinking problems. cost of shipping a block here is almost the same cost as a whole sleeved block. We have a sleeved block here that had sinking issues and was a complete waste of time and money that is the reason why we want to see the limit of the unsleeved block.

 

I would swap in that 85mm sleeved block in a hurry my friend. Running more than about 500whp on a stock sleeve (81-81.5mm) block is pushing it...nevermind overboring stock sleeves to 82mm which is a huge no-no. If you're getting 520whp out of that block, enjoy it and thank your lucky stars it has lasted this long. Dont push your luck....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18s372 &raquo;</TD></TR><TR><TD CLASS="quote">your insights are appreciated

looks like an s366 is going in to the 82mm motor and remain on the 520++ whp range as before (which has been running for more than a year now on stock sleeves) and if your wondering why a lot of people here run stock sleeves is that most of the shops that install sleeves here had sinking problems. cost of shipping a block here is almost the same cost as a whole sleeved block. We have a sleeved block here that had sinking issues and was a complete waste of time and money that is the reason why we want to see the limit of the unsleeved block.</TD></TR></TABLE>

Your "sinking sleeve" issue seems to be more of the people locally to you who have installed the sleeves, either due to installation error or other phenomena. You can't look this as black & white. "sleeves sink", is not at all a logical premise of thinking. Check with several sleeve companies and look at their practices. I'd rather go through the trouble of sending a block to a reputable ISO9001 sleeving company like Golden Eagle, that has a warranty, then to go through multiple blocks, simply on your simplified premise. It doesn't work that way, and as a seemingly intelligent person, I'm sure you're well-aware of that.

As for your S366 decision, that is a good call, either T3 or T4..
Let me know if you have questions about the S366

 

yeah that is the reason why i have another block sleeved by GE waiting in my garage. the whole point is nobody can do it reliably from where were at. maybe in time someone here will perfect the process. but anyways its been decided instead of putting a 366 on the 82mm motor were just going to boost it like [freak] and watch it crumble. its an old motor anyway. if it pops GE motor is going in to the street car and another block will be on the way from DART. S372 should be knockin at my door anytime now.

there is a guy here running an s366 on a b18( unsleeved ) making 670++whp on methanol

 

You've got to be crazy to push above 500whp on stock sleeves.. you wont make it to 700 before she pops