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Posted by: x-faktory Jan 26 2021, 02:19 PM

Some of you may be aware of my 911 engine builds, but...I've decided on building a T4-1911.....I was quickly going down the rabbit hole with bigger/better, but then reminded myself of one of the primary goals......and that is to help configure the RHD T'body design that I am using on the 911 builds... to be used for the 4 cylinder engines...starting with the Type 4. Parts are arriving and here is a sneak peek at the 1st units, mounted to manifolds.......





Stay tuned as parts for the build are arriving daily

regards,
al

Posted by: Aerostatwv Jan 26 2021, 02:24 PM

Watching. Thanks!

Posted by: AfricanHijinx Jan 26 2021, 02:26 PM

those look great

Posted by: x-faktory Jan 26 2021, 02:30 PM

These should work great too....i've been using the RHD on 911 projects with much success. This is the 1st T4, but should work equally well.

regards,
al

Posted by: JamesM Jan 26 2021, 02:34 PM

Curious to hear all the specifics!

For starters, which ITBs are you using? What diameter?

Posted by: jd74914 Jan 26 2021, 02:57 PM

Looking forward to seeing details too!

Looks like they are from RHD Engineering in AU ( https://racehead.com.au/product-category/throttle-bodies/ )

Posted by: rhodyguy Jan 26 2021, 03:40 PM

Bodies and tall Vstacks look very similar to the BMW 10 kit too. Except for the intakes. Not so sure you could run them with the rain tray in place. It could be a little spendy all in.

Posted by: x-faktory Jan 26 2021, 04:22 PM

Yes, as stated in the initial post, these are made by RHD. I worked with them a couple of years ago to configure their design for the 911 engine,,,and that turned out very well....now i am working with them to configure for the Type 4, and then the 1,2,3.
These particular units are the very 1st made to work with these manifolds...it required RHD (Rama) to design some custom brackets to ensure that the linkage crossbar would clear, etc....but these are looking good. They are 42mm and will be used on a 1911 build....mild hot rod 914 engine with 1.8 heads, Kerry Hunter headers, Microsquirt etc....my 1st Type 4 build, so bear with me....

If too tall, the bottom spacer can be removed.........

Posted by: JmuRiz Jan 27 2021, 12:17 PM

Very cool, do you already have the parts or can you bump it to a 2056? That combo with tuned EFI would be a blast.

I'm still trying to justify the price for one of your systems on my 2.7 build...

Posted by: Mark Henry Jan 27 2021, 12:22 PM

Looks a lot like the motorcycle TB's I made.

Posted by: pete000 Jan 27 2021, 06:32 PM

Always wanted to go this route on my 914-4...

Posted by: racerbvd Jan 27 2021, 06:38 PM

Posted by: rktmn247 Jan 27 2021, 08:39 PM

Welcome X-factory! Glad to see you posting here. I have followed your posts on pelican and am really looking forward to this build.

Posted by: Shivers Jan 27 2021, 09:05 PM

42mm, big for a 1911, really curious to see how it will run when it's done.

Posted by: TRS63 Jan 28 2021, 02:51 AM

That is really interesting, as this is exactly the way I have in mind for mine! Keep us updated!

Antoine

Posted by: Mark Henry Jan 28 2021, 07:21 AM

Those TB's are awfully tall and you still have to add some kind of air filter. You will lose the raintray so you might want rainhats, you dont want this sticking out the lid. Not trying to be a Debbie downer, just saying you need to trial fit the TB assembly in your 914.
I can tell you right now that it will not fit a VW beetle T4 conversion, my ITB set up barely fit in my bug.

Posted by: barefoot Jan 28 2021, 08:00 AM

For carb's yes, for FI should not matter at all as fuel delivery is independent of throat size.

Posted by: Mark Henry Jan 28 2021, 10:26 AM

Yes...but...too big and you make vacuum issues worse, add a big duration cam and you're running in alphaN/TPS only.

Posted by: JamesM Jan 28 2021, 10:48 AM

Might as well cam the hell out of it as you are most likely going to have very little resolution with the vacuum signal and have to run alphaN anyways Ran 42mm Jenveys on a 2270 with a cam optimized for lower RPM/very good vacuum and was still seeing 0 vacuum at roughly 30% throttle off idle . They were a pretty good match for that motor, running in MS hybrid mode split the map almost 50/50. Running on a 1911 I wouldn't be surprised if you wind up seeing no vacuum across 70%+ of operating conditions.