*CHAT* Adios Summer, Winters Here: The Next Episode

[PetefromtheStreets]

What kind of gains have you seen? I was at 550 on the stock Si throttle body

Jaydee made 594whp. I'm unsure of the gains exactly but he made it very clear that the tb of choice was the 74mm

s4 IG-petefromthestreets
Cage plus radio member #1

[BoostedK20]

Throttle body size on a turbo/rotrex setup is less crucial than a roots-type blower. That's why you made 550whp on the stock Si tb. A roots blower sucks air in, and is limited greatly by tb size. However, rotrex blowers/turbochargers are forcefully pushing air into the motor, forcing more fuel as well. Tb size is still important, but greatly different than a roots blower type situation.

[Bottled Morphine]

Makes sense

Fuel system king crew member #1

[aLmk]

So, I guess not quite worth it to use the tsx then?

[monjarassi]

So, I guess not quite worth it to use the tsx then?

no sirre

[snizzletoff]

Throttle body size on a turbo/rotrex setup is less crucial than a roots-type blower. That's why you made 550whp on the stock Si tb. A roots blower sucks air in, and is limited greatly by tb size. However, rotrex blowers/turbochargers are forcefully pushing air into the motor, forcing more fuel as well. Tb size is still important, but greatly different than a roots blower type situation.

I said the exact same thing in my post...that when you force air in its not nearly as important to have a larger TB O_o

[Si Speed 317]

I'm looking at a K20z1 motor and tranny today as a trade for my GT42RS. First time buying a motor and/or tranny, what should I look for? 50k miles on them, compression test was 155-160 across the board, the guy said.









Has some K-Tuned goodies and is real clean. What do you all think?

[aLmk]

I'm looking at a K20z1 motor and tranny today as a trade for my GT42RS. First time buying a motor and/or tranny, what should I look for? 50k miles on them, compression test was 155-160 across the board, the guy said.









Has some K-Tuned goodies and is real clean. What do you all think?

Wow that looks really clean! I assume it's lower compression with those numbers? I would ask for a receipt, if he has one with those numbers on it that just helps back it up. Also I would turn over the motor via the crank pulley bolt, it's a 19mm, so take a socket and a wrench/breaker bar with you, it should turn over easily enough by hand even if the spark plugs are still in. I'm not sure there is too much else you can check out without taking it apart. As for trans I really am not sure there is much you can do without taking it apart. Sounds like a pretty decent trade though Hopefully others can chime in and say I'm wrong and give you lots of things to look at! I would like to know as well because hopefully this weekend I will be checking out a z1 bottom end (all stock) to use temporarily while I get funds together for a motor build.

[PetefromtheStreets]

Looking on the Internet 150-160 was normal compression for a stock z1

s4 IG-petefromthestreets
Cage plus radio member #1

[aLmk]

Looking on the Internet 150-160 was normal compression for a stock z1

s4 IG-petefromthestreets
Cage plus radio member #1

O really? I thought it was more like 220?