supercharging sbc 383 Amerspeed ?

supercharging sbc 383 Amerspeed ?

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Discussion

Mertens

Original Poster:

37 posts

114 months

Monday 8th December 2014
quotequote all
Hi all,


I'm planning on getting a Vortech supercharger installed on my 383 sbc Amerspeed.
Any suggestions, advice ?

corvettedave

274 posts

156 months

Monday 8th December 2014
quotequote all
have u got it yet?, ive got a brand new procharger if needed, procharger is a better supercharger

chuntington101

5,733 posts

235 months

Tuesday 9th December 2014
quotequote all
Are you using the stock side slinger bracket for the supercharger? I'm not sure if these fit. i know that the few people using centri superchargers have made their own brackets.

Might also be worth having a word with v8yes on here as he has a supercharged SBC. he might be able to get some pics of the bracket.

Edited by chuntington101 on Tuesday 9th December 08:44

Mertens

Original Poster:

37 posts

114 months

Tuesday 9th December 2014
quotequote all
Are you using the stock side slinger bracket for the supercharger? I'm not sure if these fit. i know that the few people using centri superchargers have made their own brackets.

Might also be worth having a word with v8yes on here as he has a supercharged SBC. he might be able to get some pics of the bracket.



Thanks for the info. At the moment I don't use anything. I got the car to a Belgian V8 specialist yesterday who told me that the compression in the Amerspeed was already very high and that, in order to prevent detonation, they had to lower it before installing the supercharger. Wich makes it a kind off silly in my eyes...




F.C.

3,896 posts

207 months

Tuesday 9th December 2014
quotequote all
Mertens said:
Are you using the stock side slinger bracket for the supercharger? I'm not sure if these fit. i know that the few people using centri superchargers have made their own brackets.

Might also be worth having a word with v8yes on here as he has a supercharged SBC. he might be able to get some pics of the bracket.



Thanks for the info. At the moment I don't use anything. I got the car to a Belgian V8 specialist yesterday who told me that the compression in the Amerspeed was already very high and that, in order to prevent detonation, they had to lower it before installing the supercharger. Wich makes it a kind off silly in my eyes...
I fitted mine (LS) with "standard brackets".
You should start out with lower compression if you intend to run a fair chunk of boost.
Detonation could be a problem if you don't, also it would probably require "premium Petrol" as an "insurance policy".

chuntington101

5,733 posts

235 months

Tuesday 9th December 2014
quotequote all
F.C. said:
I fitted mine (LS) with "standard brackets".
You should start out with lower compression if you intend to run a fair chunk of boost.
Detonation could be a problem if you don't, also it would probably require "premium Petrol" as an "insurance policy".
Which car where the brackets of on yours?

F.C.

3,896 posts

207 months

Tuesday 9th December 2014
quotequote all
chuntington101 said:
Which car where the brackets of on yours?
They were for a GM LSX performance block specifically.
I don't know if "normal" LS blocks have the same castings on them.

These are used for old muscle car transplants, they come with a variety of "alloy fixing blocks" with lots of holes so you can move the bracket into a convenient position for you particular build.
I didn't use any of the extra stuff, just bolted the main bracket with tensioner straight on.


V8Dom

3,546 posts

201 months

Thursday 11th December 2014
quotequote all
need to lower the compression alot..

how strongs your bottom end?? ive wanted to fit turbos but the 383 needs serious strengthening if you are using a stock/tuned motor which isnt built for turbos/superchargers

corvettedave

274 posts

156 months

Thursday 11th December 2014
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agree

chuntington101

5,733 posts

235 months

Friday 12th December 2014
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Dose the 383 have a 2 or 4 bolt bottom end? If its a 2 bolt its probably not even worth thinking about. If its a 4 then you could always get a new rotating assembly (piston, rods & maybe crank).

The Italian

136 posts

121 months

Friday 12th December 2014
quotequote all
If it's an AS engine all you need is to change the heads.
That will lower your CR
AS makes bullet proof low ends
8:1 would be just fine
Airflow research can get you there. Valencia Calif (AFR)

Mertens

Original Poster:

37 posts

114 months

Friday 12th December 2014
quotequote all
Thanks for the info. It is an AS indeed.

ROWDYRENAULT

1,270 posts

213 months

Friday 12th December 2014
quotequote all
Air research indeed has the bigger reputation, but All Pro heads, which is part of West Coast Cylinder Heads in Reseda Ca make the go to heads for the serious LS people here in So Cal. Talk to Richard at 818 705 5454 tell him that lee with the Ultima sent you.

chuntington101

5,733 posts

235 months

Friday 12th December 2014
quotequote all
The Italian said:
If it's an AS engine all you need is to change the heads.
That will lower your CR
AS makes bullet proof low ends
8:1 would be just fine
Airflow research can get you there. Valencia Calif (AFR)
Are the pistons up to it though? Assuming (never a good idea) AS use stock length con rods can you just get a new set of pistons with the proper relief in them to drop the comp. ratio down to where you want it? You dont need to go to 8:1 these days. maybe let an engine builder have a look at it and see what they recommend. for the boost / power you plan on running.

v8yes

1,250 posts

170 months

Friday 12th December 2014
quotequote all
Just seen post I don't know the tech side of doing what your looking at but I can give experience of the results I would say worth every penny if done right . Google v8 yes home of the supercharged can am ( sure if you contacted can am Dave he would help you out Ahrrrr sure some one will spin picture round

Captain Slog

375 posts

196 months

Sunday 14th December 2014
quotequote all
v8yes said:
Just seen post I don't know the tech side of doing what your looking at but I can give experience of the results I would say worth every penny if done right . Google v8 yes home of the supercharged can am ( sure if you contacted can am Dave he would help you out Ahrrrr sure some one will spin picture round


No more neck aches
Steve

Mertens

Original Poster:

37 posts

114 months

Wednesday 21st January 2015
quotequote all
I've been talking to a Dutch race engineering company wich ensured me after seeing the
specs of the Amerspeed SBC 383 they could safely bring it to 600/650 hp and 650Nm by changing the
intake, camshaft and valve control and without supercharging.

Job is estimated between €5000 and €6000

Storer

5,024 posts

214 months

Wednesday 21st January 2015
quotequote all
Those numbers have been achieved before so should be possible.

Reliability/driveability might be a little more difficult to achieve.

It may be boring but an LS7 with decent exhaust will give you 575hp straight from the box and 650 with a cam change. And still do 100,000 miles without issue.


Paul

Mertens

Original Poster:

37 posts

114 months

Thursday 22nd January 2015
quotequote all
Yes I know LS7 is the way to go but it will put me €30.000 back.
I've asked the guys from Weineck in Germany what they can do for me.
Probably they can make it rev 9000 or more rpm but I'm still waiting their response and
I'm afraid their tuning will be far more expensive than an LS7 swap.On the other end
if you can say your Ultima has a Weineck in it...

They're known for building worlds best V8 between 5 and 17 litres.

Storer

5,024 posts

214 months

Thursday 22nd January 2015
quotequote all
Mertens said:
Yes I know LS7 is the way to go but it will put me €30.000 back.
I've asked the guys from Weineck in Germany what they can do for me.
Probably they can make it rev 9000 or more rpm but I'm still waiting their response and
I'm afraid their tuning will be far more expensive than an LS7 swap.On the other end
if you can say your Ultima has a Weineck in it...

They're known for building worlds best V8 between 5 and 17 litres.
Are you wanting a road engine or just track?

A sbc that revs to 9k will be a bugger in traffic. Mind you, when you do get the chance to open it up it will sound glorious.
May not last long if you take it to 9k very often though!

You pay your money.........


Paul