bhp predictions ????

[shaunwil]

Looking at the holley site there is some interesting throttle bodies as well as carbs. The only real problem is that they don\'t mention what cfm any of them are ! What size should i look for if im thinking of a streetported 13b egi n/a. The gas carb rating is supposed to be 450 with a 14in diameter filter.

The other question is if I go with the ida i may have to run it on 2 smaller gas carbs, one for each barrel.

Blimey all this is going to be crazy. The first thing to do is get the car running on a reasonable 13b with the current intake setup then take it from there with a rebuild, porting and bigger intake.

Shaun

[shaunwil]

Good point, the FD throttle is only about 50quid 2nd hand but the layout is 3 intakes in a triangle setup. Not sure if its the best option. The single holleys look cool and a custom pickup would be fun.

The current gas carb is a down draft carb, so the FC/FD setup would mean a different carb would be needed. Not sure if a different vapouriser too.

I love to do the ida setup with 2 smaller carbs and run them off one vapouriser and keep the layout as neat as possible. Talk about a cool project !

Shaun

[shaunwil]

Would something like this be suitable ?

http://cgi.ebay.co.uk/NEW-80mm-Throttle-body-Super-Hi-flow-Nissan-R32-Skyline_W0QQitemZ230118466753QQihZ013QQcategoryZ10386QQrdZ1QQcmdZViewItem

Shaun

[shaunwil]

You\'re very bad men !!!! got me reading stuff like this :

http://www.rx7club.com/showthread.php?t=199788&highlight=intake+runner+length

Shaun

[MikeLMR]

LoL, that\'s what I was thinking of when I posted about the volume

if in doubt look what works for everyone else and adapt it to suit what you want and whats bits you can find

[shaunwil]

I\'ve read the whole 8 pages and to be brutally honest im still confused. The biggest question isn\'t about runner length, its more a case of runner diameter (the thread seems to say that doesn\'t matter as much ) and plenum diameter and length.

If I went that route i would have something like a custom intake with a 65-70mm throttle body with the gas carb on top.

If i went the ida route, then id buy the stock ida manifold, dual 45mm ida intake and dual gas carbs with one on each throttle barrel with a single vapouriser.

Arrrrrrrgggggghhhhhhhh, questions, too many answers !!!!!!

Shaun

[shaunwil]

lol, the other big issue is the ausies run turbos with gas and gas conversions here are few and far between !!! Talk about re-writting the book on whats possible !

Shaun

[travellinbob]

I am pretty sure that mazrech in melbourne , oz, do good quality conversions. Just depends if you want to chase stuff up from overseas?  Any reason why you dont want a nice little turbo sitting on the 13b with the lpg?
 cheers, michael.

[shaunwil]

The turbo setup would need alot more work, with an intercooler and supporting mods. Plus I should be able to modify my exhaust to fit the 13b easily too on n/a.

The gas carb i have can be plumbed to work on a turbo without big concerns so may be a future option.

This car is a daily runner so i don\'t want it to be too mental. I\'d be really happy with 200bhp at the fly because it\'ll be used during winter months !

Cheers for the aussie link, will do a search on google

Shaun

[kev-yorks]

Would you need a intercooler with just gas shaun as the temps are going to be lower anyway?
Kevin

[shaunwil]

Thats a good question. The gas is warmed up by the vapouriser so it can aid cooling but it is still cold when its fed into the engine !

Shaun

[kev-yorks]

If not can you utilize the gas to cool the intake charge anyway similar to a nitrous cooler.
Kevin

[shaunwil]

It should do that anyway

Its the intake that will be the most fun (if thats the right word).

The other bits like having a gsl-se sump fitted and swapping the 12a front plate over and installing the 12a dizzy that are the first main jobs. Plus slotting the engine mount to take the longer engine.

Shaun

[shaunwil]

I\'ve started a new thread to the quandry of a new engine :

http://www.mazdarotaryclub.com/forums/showthread.php?p=377883#post377883

Shaun