Toymods Car Club Inc: Tech & Conversions => has anyone ACTUALLY used a lysholm/whipple style SC on a 4AGZE?

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oldcorollas
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Kita-Ku, Sapporo, Japan
Registered:
January 2003

Re: has anyone ACTUALLY used a lysholm/whipple style SC on a 4AGZE?

Sun, 15 May 2005 10:22

http://lists.mr2sc.com/pipermail/mr2sc/Week-of-Mon -20020930/015514.html
some 4th hand knowledge

Quote:

[mr2sc]4AGZE with Lysholm does exist
Alexei Chipovalov AlexeiC@versonix.com
Mon, 30 Sep 2002 14:43:42 -0700

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Hi everybody,

Finally I found the guy who has lysholm on his 4AGZE!
He does serious racing in Australia. His car is "PRB"
(Lotus-7 style). His name is John Moyes. He wrote:

"Firstly, you have found the right person as my PRB started life with a
factory 4A-GZE, but now has an Autorotor screw compressor. A new engine is
a couple of months away based on a 7A block stroked to 1900cc with a small
port 16 valve head, but with a much larger compressor.

The 1600cc engine is fitted with an OA 2076 delivering 16psi of boost via an
air-to-air intercooler. High-lift mild duration cams deliver 195ftlb at
5000rpm and 225bhp at 7500rpm on avgas. The bottom end of the engine is
standard although the rods are peened and ARP bolts are fitted to the
bearing caps. The head has had the most work done to the exhaust ports
which have been enlarged as much as possible. Inlets are only polished.

The engine has not failed in 4 years of serious racing, but was "freshened
up" after 2 years. The Autorotor is probably one size too small as I run it
up to nearly 20,000rpm at peak engine speed, which is 30% above its
recommended maximum. In spite of this, the compressor has worked perfectly
at all times.

The new engine will use a small-port 4-valve head fitted with big exhaust
valves an OA 3133/2.0 to deliver 21psi and is expected to deliver 280-300bhp."

------------
My comments:
1)As you see, Autorotor is very reliable.
2)Autorotor OA-2076 model John used on 4AGZE is just 0.76L
(he mentioned it was undersized).
3)0.76L at 20,000rpm is close to 1.33L at 11,000rpm, so
at 13,000rpm 1.33L SC should make 4AGZE to deliver about 265bhp
and 300hp at 15,000rpm (max continuous speed=13,000rpm).
4)As I already posted a while ago, I'm going to use OA-3133/2.0
(1.33L, 2.0 internal compression, same as John chose for his 7A project).

"DJJ"(David) from this list gave me the lead.
Tnank you David!

BTW, I talked with engineer from "Gates Rubber Company". Yes, it's
possible to transfer 70hp to the SC with 21mm width tooth belt, so
I need just SC, cranc, and water pump pulleys.
Does anybody have spare water pump pulley? I need to send it to tooth
pulley manufacturer to rework it for cog belt (or make replacement).

Cheers,
Alexei

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