1400SRT40. Quick or not?

[Paul]

I am considering buying a set of T40's off of a Nova Sport.

The head I have currently got is a 1400 head with mods done on it, gas flowed, ported, skimmed.

The two options I have is to keep my existing head and source a 1400 inlet manifold for the T40s.

or

To bolt a 1200/1300 head onto my 1400 SR.

Am i right in thinking that the 1200/1300 heads are the same.

Which head would give me the best gas flow and performance? The 1300 or a modded 1400.

And finally what are peoples opinions on T40's? Are they worth the extra petrol money. Will a 1400 SR T40's, be quick?

Cheers Paul

[nova_rally]

I think 1200/1300 heads are different, but the inlets will fit either. (1.4SR inlet manifold will also fit 1.3 fine, despite the common belief that it won't)

A 1.4SR with Twin 40s would be very quick - although I'm hoping to prove that a 1.4SR with a modded Pierburg will be just as effective...

I'm not sure about this but the T40s should dit the 1400 head without you having to use the 1200/1300 head, but you'd obviously want to have it ported to match. (so even if it didnt fit perfectly it would after porting...)

Hope thats of some use!

Alan

[Will]

I think 1200/1300 heads are different, but the inlets will fit either. (1.4SR inlet manifold will also fit 1.3 fine, despite the common belief that it won't)

As far as i know the 1200 and 1300 heads are the same....... the inlets defo are as you say.

The 1.4 head was square ports and the 1200/1300 are round, bolting a 1.4 to 1.3 will be restricting it so much its stupid due to the competly different size ports......... anything will fit if you make it that doesnt mean its going to be any good.

SRT40 is quick, hopefully mark (MC) will reply as he is the expert with this engine his used to push out 130hp :D

Will

Paul hasnt listed the engine spec so i will from what i know

Piper 275 cam.....

1400 flowed, ported, skimmed head (done properly!)

Weber 32/34

Rebuilt bottem end

Zorst? unsure of details..........

Adding T40s will be a benefit for sure

[NWR161282]

IT'S WORTH THE MONEY FITTING 40'S JUST FOR THE SOUND. THE EXTRA POWER IS JUST A BONUS.

[nova23]

The 1.2 & 1.3 heads use the same ports but the 1.2 head will increase the c/r, T40 will give you good power gains on a standard engine but lots if the rest of your engine has been modded ie cam, also a big increase in fuel usage.

[nova_rally]

So what kind of MPG are we looking at for T40s on an SR?

By the way youre quite bright about the ports - gonna swap the manifold as soon as the car leaves the garage! (got the 1 that goes with the Astra head so I'll use that, after porting them of course :lol: ...)

Alan

[Gazza14SR]

unsure of mpg. But, if i put a tenna in and booted it everywhere (which was most of the time) i'd get 55-65 miles to the tenna.

If i drove like a grandad (which i hardly ever did) you could get 75 miles to a tenna easy.

[peester]

wait for mike oxford; he da man.

[nova_rally]

Hmm, a tenner where you are = the sa,me amount of fuel as about ?15 round here... so..... yeh thats not bad! hamering my old mazda I could get about 60 miles for that much fuel, that was at 30MPG.

Very Vague sums but I think I could live with that! :lol:

Alan

[Gazza14SR]

Around the time i had them fuel was approx 79.9l

Gazza

[Dai-o]

so which head is the 'daddy' then (on a 1.4SR)?heard of blydenstein (spelling) heads being the best, this true?

but realistically, on a (small) budget which is best?

thanks

[benji]

i've got a 1.4 with t40s and i get a average of 220 miles to the tank of optimax, and that is with a heavy right foot. add a cam and headwork and the mpg will go down even more. the sound is amazing. my standard 1.4 with t40's has beaten corsa gsi's and saxo vtr's.
i am having some work done on a sri head to fit to a 1.3 manifold so that should make a bit of difference but really you should think about a B+ head and a ast2 cam

[peester]

so which head is the 'daddy' then (on a 1.4SR)?heard of blydenstein (spelling) heads being the best, this true?

but realistically, on a (small) budget which is best?

thanks

blydenstein is the daddy. for 1.3/1.4 sr only he does a B++ pack now. very dear but his quotes for gains are impressive. phone him up and just ask him about the B++ (if im not mistaken.) he'll chat for ages. top dude.

[LiD0N]

paul get a 20xe u no u wanna lol

[rgv_stu]

the inlet on a 1400 sr will bolt to the 12/1300 heads but the ports wont line up a) there different shape and b) they are offset to the valve on the 1400 sr head

[Paul]

So how quick will my 1400 SR be then?

I am definately going to get them.

Need to get a 1200 head, or should i try and source a 1400 inlet manifold?

Cheers Paul

[Philsutton]

I have a 1.4sr engine in mine its has a ported, polished head a cam of some kind not sure what, four branch manifold, competition valves and springs and of course some twin 40's. I had it rolling roaded 90bhp at the wheels which will make it 110+ at the flywheel. A 1.4 on twin carbs is very fast, plus it scares the s**t out of people when you boot it past them. Im gonna have mine down santa pod on the 25th jan to see how much faster it is since ive put the carbs on.

[Paul]

the jump im goin for is a 32/34 webber to a set of T40's will the difference still feel big?

[benji]

A 1.4 on twin carbs is very fast, plus it scares the s**t out of people when you boot it past them.

it's best when you are doing 50/60 mph next to someone with their window open, and then change down to 2nd. lol, they shit their pants :D

[lightweight racer]

Correct me if i'm wrong (i'm sure u guys will!!) but i thought the best combonation was a 1300sr head on a 1400sr bottom end. Isn't the 1400 head restricted? if its been ported fair enough.
ALSO
Its easier to get inlet and exhaust manifolds for the 1300 head.

[mikeoxford]

just to put another spin on things........

dont forget the 1.4 multipoint out of the sri has round ports!

so that would mean you could use a 1.6 inlet manifold for the 1.6, and still use a 1.4 head.


hrrrrmmm LOL :lol:

[nova_rally]

And the 1.4SRi head also has bigger valves so it's really the best standard head. I thought the ports were kind of a cross between round and square? (crap description I know lol!)

I'm trying to get hold of 1 round here, but it's hard work. Whatever I put on it next it will be port matched with the inlet. The current mixture of parts is a right mess (not sure If I beleive the mechanic actually did use this combination or not - 1.4SR Inlet on an Astra 1.3 Head, 1.4SR camshaft and the timing belt for an Astra 1.3. It runs anyway!)

Alan

[CP]

I'm agrees with Mike. I'm waiting on an SRi head but if it as expected then its the best un modified head to fit on a 1.4. It has the largest valves and the best port design combinations of all of them. 1.2 and 1.3 heads have small valves although the 1.3 does raise the CR.

If you can get a reasonably cheap sri head ( i got one for ?50 ) and then you have it skimmed to raise the CR a bit its got to be very cost effective and still pretty much std.

I havent tried it out yet tho

[nova_rally]

whilst were on the swubject of heads I've just been looking at my 1.3 manifold and it has Arched ports (square bottom, round top) - I thought it was meant to have round ones? Whats the 1.4SRi head's ports?

Alan

[benji]

SRi head
http://uploader.co.uk/images/pict0087.jpg

[nova_rally]

great Thanks! maybe when I can afford 1!

What inlet do I want on that? 1.3SR with the 2e3?

Alan

[Aragorn]

im running a heavily skimmed 1600 head on my 1.4 and it seems "quick"

problem is ive never been in another fast nova and have no idea what kinda performance my engines putting out

i suspect its around 80-90 bhp with the mods (gte head with ~15thou skimmed off, gte injection system, sr cam, pipercross filter, soon to add ashley system and manifold)

methinks we should organise a RR day for NL :D

[L1OONEY]

Hi at the mo im gettin trouble with my power i havnt got a clue changing the plugs and leads later shes only a 1ltr but u guys/girls aint helpin ur all making me want a 1.4 sr with twin 40's soon hopefully idont know a lot about engines apart from the basics but i take it with twins its loud if so ive also got a straight through off a gte and for a 1ltr its pretty loud...........

[nova_rally]

Benji - I notice on your 1.4SRi head you've got the new port shape marked out - which manifold are you going to use?

I'm considering getting the SRi head but aint sure which inlet I should keep for it! (either 1.3 or 1.4SR)

Alan

[Cheese]

That port shape that is marked out is for a 1300 manifold or a 1300 Sport 40s manifold.

[nova_rally]

I was expecting to have had to cut more material than that! Even better if that's all that's involved.

('Thats all' he says! :lol: )

Alan

[benji]

it was for a 1300, i did it myself and bolloxed it up. the port next to the dizzy has a water way behind it and i butchered through it, so i need a new head now and will get it done properly

[m.d.]

when you port a head out on the old 1.8 head you go into the water ways on every port to get a decent flow. all you have to do is get it welded up and grind it back again. job done

[nova_rally]

I'm doing mine myself as well - were you cutting straight down to make the whole port bigger? I'm angling mine upwards so that it will just match the inlet manifold and then will be smoothed into the original port shape. Could always just port it for an SR manifold (or port the manifold whichever's best).

Alan