1150 or 1100 head? is one really better?

[Big Jay]

Re: valves for street-strip rebuild

Howdy- any sources suggested for replacement valves, 1150 head?

Not a serious race engine, looking for increasing size if cost is within reason, especially on the exhaust side.

thanks all

The largest selection;

http://gszone.biz/valves.html

Jay

[RobGS850L]

Years ago when I started drag racing Mopars we had the books and parts put out by Mopar for tech help. At first it was Hustle Stuff then Direct Connection and now it's Mopar Performance. It was a great way to provide us bracket racers with enough tech and parts to have a faster and more consistant car and also a much more dependable racer. Why isn't there a source for the Suzuki's? After 25 years of dominance you'd think somebody would've thought of it. I mean these books didn't show how to port and polish a Pro Stock head but they sold the parts and gave enough info to build an 8.90 car. I'm sure there are a few guys in this forum that could write the book on Suzuki prformance.

[melray]

re. books and parts

I think this and the GS zone are it. These sites offer more info by a factor of maybe 10,000 than Suzuki ever put out.

thanks again for the info and references guys.

[Silvermachine81]

Yeah, But on a street bike, wont the superior flow of the 1150 head up top cause you to lose some low end?

I mean thats what youre using most of the time, Right.

My search (in my country) for an 1150 head has gone on too long now so I've got a brand new EX? head (Differently positioned Valve cover holes) still wrapped in the plastic and i'm about to throw some 1mm oversive valves in it and run 1150 cams.

Surely thats gonna kick ass for the street but would be a bit breathless down the strip compared to an 1150 head?

I want useable power again, Like it was when it was stock but also let the pipe and carbs do their work up top.

Someone tell me if im wrong?

[melray]

1100 vs 1150

the head and cams are almost the only significant diff between the original 1100 model and 1150, and the performance diff was significant.

in other words, in stockish street form there is a noticable increase with the 1150 head and cams.

[RacingJake]

Here's what the ports look like. 1150's are bigger.

[Silvermachine81]

Wow, Quite a difference really.

[GS750RACER]

If 29.5 is the biggest on intake what is the biggest for exhaust on 1150

[gs11ezrydr]

Big valves are great.Depending where you want your power.Bigger slows flow down at lower rpms. Smaller well designed ports effeciant will move a lots of cfm.Swapping heads need someone experianced.