Home brew ITBs

[mmt 15]

Hi Guys, 

I’ve been building a new GTI6 race engine. Started out using the original single TB alu lump inlet manifold. Sounded and performed ok on the rollers. However something went wrong- engine out! On that same day an ex. DTC s2000 306gti6 (same as BTCC) was due to be rolled as well. The engine had ITBs - so the journey begins. 

 

[mmt 15]

Some years ago I bought some ITB from a 4-age Toyota Blacktop engine. In the storrage I also had an old Mi16 inlet manifold. 

[mmt 15]

Started out cleaning the ITBs. Tootbrush and oven cleaner. 

[mmt 15]

Next I made the mounting plate for the ITBs. This was a lot of work. Meassuring, drilling and cutting. At the same time I Cut the Mi16 manifold. 

[mmt 15]

[mmt 15]

Next up was preparing for the mounting plate to be welded on to the Cut manifold - welding, painting and mounting the ITBs

[mmt 15]

Dremel time.  Mating the ITBs Withers the manifold

[mmt 15]

More cleaning / Sponge bath 

[mmt 15]

 Putting it together. 
Also I needed to make a ToyPeu throttle cable bracket. It fits the holes on the ITBs and uses the Mi 16 throttle cable.

[mmt 15]

Many years ago I bought an Air box from another gtidriver. The airbox was made to fit Webers- Cut out the back plate and made a new one to fit the new ITB setup. 
Also needed to fit the Peugeot Air temp

[mmt 15]

Shiny stuff arrived from Australia. 100 mm stacks one-piece alu. Nice. 

[mmt 15]

Sourced a connector to the TPS. The local Toyota dealership parts guy loved sourcing something special. He had to go into old books (real papir books!) to find the right part. 

[mmt 15]

Next up was filter for the airbox - this time the Italians are up. Filter comes from a 1994 Fiat Punto. 
 

 

[mmt 15]

A very Nice winter project. Looking forward to hear the ITBs roar. Engine is soon going back in. 
 

Cheers

[petert 586]

Love your work. Although I think you need more AC balance in order to deepen the penetration on that fillet weld! I've done exactly the same with two Nissan R32 TB's and an Mi16 manifold.

[Tom Fenton 1,542]

Looks great. We had a similar setup on my mate and I mi16 track car. A trip into the tyre wall smashed them to bits along with scrapping the shell ☹️

[mmt 15]

Thanks guys. 
@peter How much did you gain with the ITBs? Are the Nissan ones also 45 mm? 

[allanallen 528 2 Cars]

Nissan bodies are 45mm, I use a pair on my mi16, otherwise standard engine made 180hp and 147lbft

[Tom Fenton 1,542]

Ours made 177bhp and 145ftlb. My mate Phil was mega pissed off as he put loads of work into it all, second set of injectors in the bellmouths etc

It made 170bhp before we touched it.

[allanallen 528 2 Cars]

16 hours ago, Tom Fenton said:

Ours made 177bhp and 145ftlb. My mate Phil was mega pissed off as he put loads of work into it all, second set of injectors in the bellmouths etc

It made 170bhp before we touched it.

I remember seeing him at Mallory when I was in my supercharged mi, he was livid

[petert 586]

17 hours ago, mmt said:

Thanks guys. 
@peter How much did you gain with the ITBs? Are the Nissan ones also 45 mm? 

No idea! They're still sitting on bench. A set of 48mm EFI Hardware TB's came up at a price I couldn't refuse. When did you buy your trumpets from?

 

[mmt 15]

SQ Engeneering. They are really nicely done.  
 

https://www.sq-engineering.com/

 

 

[Tom Fenton 1,542]

2 hours ago, allanallen said:

I remember seeing him at Mallory when I was in my supercharged mi, he was livid

Oulton Park I think, but yes he was an extra grumpy ginger man, he put a lot of work in.

[allanallen 528 2 Cars]

Deffo Mallory, remember it well, dad spilt a bottle of milk in my rear footwell, I was ecstatic.... 

[mmt 15]

DONE! 
complete install done. Borrowed a freinds lift and crane- I’m getting too old for crawling around on the floor. 

 

Edited May 16, 2020 by mmt