Tigger09

I have a 85 GS that will soon be upgraded to a -SE. Front & rear suspension and a 13B. I have a Delloto that will be going on the 13B and is designed to work with the 6 port motors. Next sunner I want to supercharge the car with a atkins S/C. I have a 85 -SE 13b and a 87 TII 13B and I don't know which on to rebuild for my car. Does any one know about th Atkins system on a 13B? As far as I can tell the 5th and 6th ports are open all the time. If this is the case I don't see a reason not to use the T2. Some one please help enlighten me.

Also is there any diffrence between a 6 port and 4 port TII? Besides the ports? I know that some TII have lower compression but aside from that the TII doesn't differ too much from a 6 port, right?

Help, I don't know what to do.

riffraff

whydo you want to put a blower on your seven? i didnot think that you could get that much performance out of one on an engine as small as ours.

TII's have lower compression. that has nothing to do with the number of ports.

Tigger09

Why isn't important I know that some TII have lower commresion, I said that in my post. I also know that rotoe commression has nothing to do with the intake ports. You missed the point of my post.

A supercharger or turbo would work on any motor from a 500 cubic in. V8 to a RC airplane engine. The physics is the same.

smnc

SC's work fine in 13B's...

I wanna put an Eaton blower in my car next year...

BTW, as I understand it, the only thing that effects the compression is the rotors. 13BT's have a bigger "dish" machined out of the rotor face, making for lower compression.

Tigger09

Thank you to everyone trying to help me BUT........

1. I understand about the rotor compression, I know that the dish is deeper for lower compresion turbo motors. That is not what I was looking for.

Is there anything else in TII motors that is diffrent. Like beter rotor housings, larger oil passages, thicker or better apex seals, larger oil pumps. Stuff like that. As far as I can tell the only diffrence between a N/A 13b and a TII 13B is 4 ports vs 6 porst and compression. Is that it?

2. I know a S/C will work on a 13B. What I want to know is how will a Atkins or any S/C work with the 5th and 6th ports. Do you pull the sleves out and keep the ports open during the whole power band, are they kept closed, or are they opened and closed like they are in a N/A 13B.

peejay

T2s also had different rotor housings with no diffuser in the port and the coolant passage was re-opened (it's blocked off on 6-port engines).

T2 end plates also apparently are stronger around the upper dowel pins, which like to break when subject to detonation and/or very high HP levels. They were improved in '89, and again in '93 for the REW engine.

People have successfully done supercharging (both mechanical supercharging and turbocharging) on 6-port engines... I'd just be very careful about detonation so you don't crack the rear end plate.

Jeff20B

iTrader: (13)

I've seen an atkins 6 port SC manifold and there are no holes for the 5th and 6th ports.

Tigger09

Is it one small port on the manifold or is it a lager port? Like a larger port that would match up with a 4 port.

yayarx7

All TII's are 4 port. As are 12a's, 13B-REW and pre '79 13B's. Only FI NA 13B's are 6 port.

peejay

A lot of Japanese 12As were carbureted 6-port engines, too.

yayarx7

I did not know that, and stand corrected, Thanks