New beginning

[dbv8]

This block was originally the basis of a 4.6 with 4.0 pistons built for Paul (Brummmie), then passed on to Peter (Haircutmike) and then onto myself.

So its had a hard and intersting life and has produced excellent numbers along the way.

It now has a fresh set of top hat liners ready for the latest build....





The 500 heads have been cleaned up and the valves reseated.
I will be fitting my old inlet manifold which i am currently porting from 45mm and matching the 500 heads and will be topped with a fresh blended trumpet base (pics to follow when complete).
Just need some decent quality head gaskets and start botling back together.

[Hoofa]

Fit the mls gaskets, I have or rather rob did , stupid copper ones leaked

[slideways]

Hoofa said:

Fit the mls gaskets, I have or rather rob did , stupid copper ones leaked

Nigel. How did you get on with sourcing that clutch?

[slideways]

Derek what are the benefits of blending the trumpet base?

[dbv8]

slideways said:

Derek what are the benefits of blending the trumpet base?

There has always been a debate on trumpets, flared, shortened, carbon fibre etc.
Taraka never bothered, just removed the trumpets and opened up the base to a taper into a ported inlet manifold. Peak horsepower was excellent with some losses in torque.

Another consideration in my case are that i leave nowhere for fuel to drop and collect that is injected with the nitrous before the throttle.
I use chemical metal to fill the voids around the base also.

I had my car dynoed with the blended base at Dales and torque was very good through the rev range and the car drove excellently NA.
Torque just shoots to silly levele anyway on nitrous on the dragstrip so if there are a few lost NA i would never notice.

[dbv8]

Hoofa said:

Fit the mls gaskets, I have or rather rob did , stupid copper ones leaked

Andrew at Chesmans reckons they are a waste of money. He recommended Elring composites

[Simon says]

dbv8 said:

Hoofa said:

Fit the mls gaskets, I have or rather rob did , stupid copper ones leaked

Andrew at Chesmans reckons they are a waste of money. He recommended Elring composites

LR OE then Elring are considered to be a very good gasket brand in the motor trade looks nice Derek happy building

Edited by Simon says on Wednesday 1st August 22:01

[Goaty Bill]

Hmm.
That doesn't look like a BBC to me




This is what you were looking for Derek!

[dbv8]

Maybe in a couple of years when I want to run 8's Bill.
I still believe I can get the little 4.6 to push me to a 10 first.

[Ribol]

That does look like a really nice place to be starting from, had you only done one you would have regretted it.

Good luck with the build

[dbv8]

As usual I find myself busy with stuff that wasnt on the initial job list.
I have ported my own inlet manifold so the one that came off this engine is on fleabay to make some funds for bearings, gaskets etc.
Its a very nice manifold, 45mm ported properly all the way to large ports

[Simon says]

dbv8 said:

As usual I find myself busy with stuff that wasnt on the initial job list.
I have ported my own inlet manifold so the one that came off this engine is on fleabay to make some funds for bearings, gaskets etc.
Its a very nice manifold, 45mm ported properly all the way to large ports

Seen it and recognised the seller

[dbv8]

Finally some real progress. Big day tomorrow

[TVR Beaver]

Derek.. looks good!.. what head bolts did you use.. the stretch type or studs?...

[dbv8]

ARP studs for the heads and mains

[haircutmike]

Strange world Derek, you're putting yours in tomorrow and I'm taking mine out!

[dbv8]

haircutmike said:

Strange world Derek, you're putting yours in tomorrow and I'm taking mine out!

Such is the hokey kokey world of Tiv modding and abuse.

[V8 GRF]

slideways said:

Derek what are the benefits of blending the trumpet base?

I'd heard that it was something not to do.

[dbv8]

V8 GRF said:

I'd heard that it was something not to do.

Worked for Taraka.

The engine came with the trumpets removed and the base blended into a 44mm ported inlet manifold.

With the typhoon cam and megasquirt gave me 275 bhp @ wheels and a nice flat torque curve so i am happy with it. Also i prefer it for an uniterupted route for the extra fuel and nitrous i inject before the throttle.

[V8 GRF]

Here's the thread:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Swings and roundabouts it would seem, but as pointed anything is an improvement over the standard straight tubes.