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Discussion Starter #1
Hi,

Building 383 with the 2Bolt L98 block for friend and just wondering if the 2Bolt will handle 480-500HP.
11.1 motor with all the good parts.-Mini Ram ect.

He's pushing his budget ,Not charging labor!
:thumbup:
Studs?
2Bolt Steel caps & studs?

There wanting about $800.00 around here to set it up,
Caps, Studs Machining , ect.
This will be a 6500-6800rpm street motor when complete.

Suggestions or recommendations appreciated.

Thanks
:D
 

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Discussion Starter #3
L98 Main Caps

Hi,

Thanks for reply and guess will talk him(his wife)! into going
to 4Bolt.
Will shop around and see if can find the three straight 4Bolt
steel caps that are set up for the L98 2Bolt register.

May look for a outa town Shop that I feel comfortable as to
do the line boring also.
Don't want to play games with special Timing Chain and Rod
to cam clearancing if they take a hunk off block side.
Will be running a pretty stout Hyd Roller.

Any recommendations on Main cap vendors or other suggestions?
:thumbup:
Thanks
jay:cool:
 

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Race it, Don't rice it!
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Steel 2 bolt caps with a strapped rear main will live forever at 6800. On and off the throttle a lot is when you need to start worrying about 4 bolts. Splayed caps are still a better choice. 4 bolt caps are only marginally stronger than a proper built 2 bolt.
 

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Discussion Starter #6 (Edited)
Main Caps

Hi,

Okay,

Are you talking 2Bolt steel Caps with studs or just studs.

And have never run a stud girdle and whats involved?
Machine work?

Also know any cap change going to require Align Boring.

This motor will not be thrashed but when set up will be pushing
500.

He's just alittle worried and I personally have never run anything
other than 4Bolts, BB or SB. So I have never had a lower end
problem even in some 374ci 8700rpm weekly roundy machines.

Thanks:thumbup:
Jay:D

johnsongrass1 said:
Steel 2 bolt caps with a strapped rear main will live forever at 6800. On and off the throttle a lot is when you need to start worrying about 4 bolts. Splayed caps are still a better choice. 4 bolt caps are only marginally stronger than a proper built 2 bolt.
Hi,

Thanks, Do appreciate both of your input.

If we go 2Bolt steel caps and studs might as well go steel
4Bolt on the three center mains as align boring still there.

Been out of it for years but have built alot of my motors for
both Drag & Dirt few years back.
Was sponsored by Loper's Performance Center for my Late
Models for many years, they did machine work and I built the
motors.
Like I said, it has been quite a few years and alot has passed me by.
We were one of the first to start playing around with the SB 400
and 350 cranks-Spacer bearings-block fill-2bolt to splayed 4bolt.
Back to the present!
Main girdles? cost? machine work? Pan problems or modifications?
Rear main strap? same.:confused:

Thanks:thumbup:
Jay
 

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A main girdle just ties all the main studs together at the bottom. I do not think that you will need any machine work, but I have never run one. Honestly, I am not sure who makes one for the chevy.

Bolt mains are certainly over rated and you can easily make 500 ponies without problems. I would not even worry about new caps, but that is just me. I think studs would be just fine.

I have seen alot of junk engines make alot of power for a long time. I have seen alot of high dallar engines blow to pieces. I just dont buy all the hype sometimes.

Chris
 

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Discussion Starter #8
Mains

Hi,

As to the hype, agree with you.
Take alot with a grain of salt; Think about it for awhile and
usually works out.

I'll probably just go with ARP studs on all the caps. I also
worry about the sloppy main registry have seen on some
of these caps.(That was awhile back) may have changed.

Time to start talking heads to him now.
With the 11.1 comp he wanted, will be aluminum!
I't will be injected,6"rods,high altitude and good cooling
so should not be a problem with good gas.
Trying to get him to loosen up his converter alittle to help
with detonation but do not think will be a problem.
Weekend warrior and Tolene not that expensive if he runs
into a problem on ocassion.;)
Thanks
jay:thumbup:
 

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With proper tuning he should be able to sqeeze by with 11:1 and AL heads, but that is pushing it. There are alot of nice heads out there for around $1000 give or take a little. Sounds like it should be a nice engine.

Chris
 

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Discussion Starter #10
Mains

Hi,

A couple of things that are going to help with the comp ratio
besides the alum heads are;
1. Inj-MiniRam
2. 6" rods
3. mainly driven above 5000 alt
4. good cooling
5. bleed a little off with cam choice

Not alot by themselves but they all add up.
Like I said tring to get him to loosen up his converter about
800 to 1000rpm and would help alittle.

Heck, probably going to scare him to get to carried away anyway.
His idea of a fast car is a Honda Accord.

Was thinking about 180-195cc heads for this thing.
Head recommendations appreciated:thumbup:

Was thinking AFR but have read good things about trick flow.

Jay:D
 

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You will certainly be happy with AFR or TFS I am sure. Either are very nice heads and flow the best out of the box of any of the aftermarket heads. Large cid small blocks respond well to large port heads and intakes. I would not hesitate to go to a 200cc head for that engine.

Cam selection will certainly play a factor in your detonation resistance. I would keep lsa pretty tight to keep cylinder pressure low in the low RPM. I like 106-108 for a hot engine with the proper convertor and gears. 230-240 @.050 should help with this as well as making a heck of alot of power with those heads.

I am curious about the mini ram you are talking about. I dont know much about them, but some of the EFI manifolds are not real great for large cid stuff.

Chris
 

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Discussion Starter #12
Hi,

The one I'm talking about is made by TPIS and is designed
around the larger SB and takes the RPM range, unlike the TPI,
into the 7000+ range.

The TPI setup, even with the Big Tuges or siamized setup
pretty much run out of steam between 5000-5800.
Big plenum and short runners really start working at about
3500 and your not losing a whole lot of torque and HP down
low.

Was running one on my old 355 in a pretty well setup Iroc
and even with 3.27 gearing and stock stall was a handful
once it hit 3 grand. Of course the low 700R4 got the ball
rolling.
If curious just look up (Tuned Port Injection Service) on the
web. There are others, but like the low design for hood and
strut brace clearance unlike some others.

Later
Jay :D
 
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