Trumpet Base Blending,

Post by **Coops** » Mon Jan 05, 2015 6:01 pm

Hi guys,
been advised as im now running force induction to remove the trumpets from the base and blend it in,
I know a few of you have done it and looking for advice etc, (p.s a few have given advice already)
but would like a wider range of advice of how it was done before I try and do my own

Eliot · Post by **Eliot** » Mon Jan 05, 2015 7:14 pm

depends what you are running at the moment. Blended base will perform better than std oem 36 m trumpets, but if you are running proper trumpets (not the oem ones) - then they will still work best imo.

v8250 · Post by **v8250** » Mon Jan 05, 2015 8:07 pm

Coops, do you know the MEZ website? It's worth taking an evening and digesting some of the good tech-info there...

http://www.mez.co.uk/ms12.html

Hold on...Coops/Eliot, I'm just about to make a public arse of myself; Eliot, you are Mr MEZ

I'll get coat and leave now...

PS Coops, you're in Newbury...I'm in Cold Ash!

Eliot · Post by **Eliot** » Mon Jan 05, 2015 9:07 pm

Yes i'm mez...

Rather long thread over here on pistonheads that's worth a read too:
http://www.pistonheads.com/gassing/topi ... g%2E%2E%2E

All N/a stuff though.

SimpleSimon · Post by **SimpleSimon** » Mon Jan 05, 2015 9:10 pm

Jools at http://www.kitsandclassics.co.uk/engine-ecu/ does one if you dont fancy the graft, or its out with the burrs (the voids have now been built up since that pic)

Post by **Coops** » Mon Jan 05, 2015 9:13 pm

Hi Eliot (MEZ

)
stock, standard un modified think you get the idea the trumpets are stock length and size,
yup like that simple simon that's what im after,
V8250 blimey small world im in Compton

Eliot · Post by **Eliot** » Mon Jan 05, 2015 10:42 pm

I made a rounded cutter for my milling machine to cut the trumpets into the base.

Coops if you are not in a hurry and your base (and therefore inlet manifold) are totally stock, i could yank the trumpets out of the one i have here and flare it out for you to try out?

v8250 · Post by **v8250** » Mon Jan 05, 2015 10:55 pm

Coops...Compton? Crikey, spent much of my latter youth in/around Compton, learning to drive at what now seems like crazy, crazy speeds up along the downs, out to the Ilsleys...long winter walks up Apple Pie Hill...and down it on an upturned VW Beetle Bonnet when it snowed; it used to snow all the time then...and superb blasts to The Bell at Aldworth for pints of Maggs and a few hot cheese rolls

Now, you've just brought back a wonderful memory of Compton...apologies all for the trip down memory lane...there used to be a fellow in Horn Street who owned an opalescent white Lotus Esprit Turbo in the late 80's, I had a black 911. We'd sometimes meet heading north on the A34, take the Compton exit and drive with mucho's gusto on the East Ilsley to Compton road!

PS are the Compton Players still going...?

Post by **Coops** » Mon Jan 05, 2015 11:44 pm

love the east ilsley to Compton road, yup the CP still going,

I was born in the area and never moved away

Elliot that would great thank you, I have a spare hotwire TB I can swap with you if you want so you still have one once its done??
my inlet has been ported but cant remember to what size I know the outlet from the stock TB is smaller than the ports in the top of my inlet base

The car is going for mapping at Bailey Performance Ltd Shropshire way around first couple weeks of March if everything goes to plan.

unstable load · Post by **unstable load** » Tue Jan 06, 2015 5:10 am

Somewhere in my wanderings around the interweb I found a picture of a trumpet base with a phenolic block in the bottom that had been blended, I could do a search through my hard drive for it if you are looking for ideas. Let me know if you want me to dig around.

chodjinn · Post by **chodjinn** » Tue Jan 06, 2015 7:49 am

unstable load wrote:Somewhere in my wanderings around the interweb I found a picture of a trumpet base with a phenolic block in the bottom that had been blended, I could do a search through my hard drive for it if you are looking for ideas. Let me know if you want me to dig around.

Yeah Eliot made one for me when I had the MGB V8 TT, but I never had the engine running.

Eliot · Post by **Eliot** » Tue Jan 06, 2015 9:47 pm

Coops wrote:my inlet has been ported but cant remember to what size I know the outlet from the stock TB is smaller than the ports in the top of my inlet base
.

By how much?, seems a waste having a ported manifold if the trumpet base is std.

Post by **Coops** » Wed Jan 07, 2015 12:03 am

it was a quick swap over if you remember from when the Twin Plen didnt fit,
wasn't until the car was up and running that we remembered that it hadnt been done,
i opened the top of the inlet out to match the twin plenum base, i can measure that tomorrow after work as the base is in the garage still due to not being collected yet,

Post by **Coops** » Sat Jan 10, 2015 11:57 am

managed to get out to the garage this morning,
not as big as I thought,
been opened out to 42mm to match the old TP base

Eliot · Post by **Eliot** » Sat Jan 10, 2015 5:10 pm

so are the trumpets the original oem sized?