1.4i to 1.4sri performance

[day]

ive just got a few easy questions for ppl.

what is it that gives the sri that more bhp (apart from the mpi)?

and wot exactly is the spi? is it whats where the carb would be?

whats involved in chinging my 1.4 spi to mpi? or would a webber carb be as easy to fit?

what would i have to look for in a scrappy to know its a webber and the right size?

ill have about ?200 soon to make it abit quiker, any suggestions to wot i should fit?

thanks

[benji]

the head is the main difference. bigger valves and better flow.

[clawsk]

Im no expert but id of thought an sri is quicker than a standard 1.4 cos it will have a totally different set up e.g different cam different fueling and it'll be tuned alot more etc.
As for a weber if your car is a carb car to begin wiv which i think the standard 1.4's are then a webber will make it quicker and if u find 1 in a scappy it will say weber on it. Have heard on here that u can get a weber carb off an old land rover.

If i had ?200 to blow id go get an sri or even better a Gsi engine and drop that in!

[Jack]

In terms of the weber, at a scrappy you're most likely to find a 32/34, ought to give you a few more horses but not as much to get you to MPi performance. I don't have any pics to hand of a 32/34, but the carb ought to have a metal tag on it waying "WEBER" and a code number.... also it'll have the "W" logo forged on the carb body. I think it might also have 32/34 stamped on it, but don't quoute me on that.

Its possible to nab a weber from a scrappy for around ?20.

1.4 carb (i.e. SR) = 74bhp
1.4MPi (i.e. SRi) = 82 bhp
1.4SPi = sixty-something bhp lol


oh yeah and u could add a 1.2 head to get a bit more oomph from it

[clawsk]

Nova sr 74bhp Nova sri 82bhp? Does that mean that Sri's are quicker than sr's? this confuses me man, My mates sr is just as quick if not a little quicker than my mates sri. Both engines are standard with exhaust and air filter.
Not sayin ur wrong mate but ive seen Sr's and Sri's be quoted as having all different kinds of horse power.
I rekon they are both exactly the same but i know for a fact that some Novas came off the line quicker than others!
Personally id have an Sri cos the carbs on them sr's are totally wank!

[Jack]

yep, SRi is 82bhp. I think gearing might be different.... don't quote me on that tho.

[nova_rally]

Your mates SR has the F13 CR gearbox same as mine which is a quicker gearbox than the SRi is fitted with, hence it's quicker. Fit the same gearbox in your SRi and you'd notice a difference.

By the way:

14NZ engine (1.4SR) = 72BHP
C14SE engine (1.4SRi) = 82BHP
C14NZ engine (1.4i) = 61BHP

Alan

[Jack]

I thought the 1.3SR was 72bhp? Ahh well. :P

[Snowface]

1.3sr - 70bhp (69bhp earlier and even less with the early single choke 1b1 carb)

1.4sr - 72bhp but some more torque aswell

[Adam]

That is what you have to watch with the 1.4SR(Group 7), they are two groups more expensive to insure and yet the 1.3SR(Group 5) is only around 2 bhp less. Is that really worth the extra expense, 2 bhp.

As for a weber carb you would need to swap a few parts, as i was reading your post i was thinking that you thought that Weber carbs would just bolt straight on.

The SRi also has a CAT, restraining more power, any 1.4SRi would p*ss all over a carb-equipped Nova. Basically because of the multi-point injection. That is the reason the SPI(single point injection) is so slow, its in the same league as a 1L OHV engine, beause of the injection type.

[day]

so i was wrong in thinking that i could jus remove the injector?(is that what its called?) where the carb would be and bolt on and pipe up a webber with an adaptor plate and itd work?

also am i right in thinking that say a gsi (for example) exhaust manifold would fit this engine and would be ok to fit a gsi s/s full system (without cat box). im just wayin up my options here.

i have a 1.2 head (actuall the whole engine) (carb not i if it makes a difference) would this fit the 1.4 engine i have? id just need a new gasket right?

[Will]

Your mates SR has the F13 CR gearbox same as mine which is a quicker gearbox than the SRi is fitted with, hence it's quicker. Fit the same gearbox in your SRi and you'd notice a difference.

By the way:

14NZ engine (1.4SR) = 72BHP
C14SE engine (1.4SRi) = 82BHP
C14NZ engine (1.4i) = 61BHP

Alan

F10 CR allthough this box doesnt technically exsist i think it uses a mixture of different boxes but the F10 housing etc........ its a closer ratio on the mk2 SR's and SRI's than mk1 1.4 sr etc etc

as for bhp

and just for records, ppl will always argue difference and the thing to remember in this case is the cars will come off the production line being slightly faster/slower with more/less torque than the other because they were made some time ago etc..... when tested vaux wud take an average and prob a higher of the averages to publish as the standard figure. here is the list as i see it IMO

1.0 40-45bhp
1.2i 45bhp
1.2 carb - 55bhp
1.3 L, GL, SR 69bhp
1.4 L, SR (mk1 and 2) 72bhp
1.4i (spi) 60bhp
1.4 SRI 82bhp
1.6 GTE/GSI (cat or otherwise all the same) 100bhp

not diesels they are dirty ;)

Will

[Ste_Nova]

F10 CR allthough this box doesnt technically exsist i think it uses a mixture of different boxes but the F10 housing etc........ its a closer ratio on the mk2 SR's and SRI's than mk1 1.4 sr etc etc



it does... cause i blew one up last week.... now i have an f10/5 wr fitted.... 120mph @ 4500rpm anyone :lol:

[Snowface]

thats what i have in my nova (F10/5 wr) i can do 100mph at only 4000rpm in fith quite easily on motorway, although i VERY rarely take it that far. as its an instant ban over a ton.

[nova_rally]

Ste thats well unlucky! must be so slow off the mark now! 4000RPM in mine gets me to 80mph!

F10CR eh? well my mates had F13 cast on it - dont know about mine coz its so gunged up in oil you can't see! It's not the WR one though!

Alan

[Aragorn]

the MAIN reason the 1.4spi is 10bhp down on the 1.4SR is the exhaust manifold, cat and the cam

head is identical and the actual TBI unit is not much more restrictive than the 2e3 and will be more efficient due to the lambda

i'd bet if u fitted an SRi manifold and GTE system along with a 1.4sr cam and ditched the cat u'd be looking at 70ish bhp

[Will]

thats what i have in my nova (F10/5 wr) i can do 100mph at only 4000rpm in fith quite easily on motorway, although i VERY rarely take it that far. as its an instant ban over a ton.

good thing i drive a 1.2 now then :lol: :lol: :lol:

[Ste_Nova]

Ste thats well unlucky! must be so slow off the mark now! 4000RPM in mine gets me to 80mph!


suits me fine... i do 35k a year motorway miles

[Ste_Nova]

although i VERY rarely take it that far. as its an instant ban over a ton.

lol i drive everywhere at 100mph+ takes ages to get anywhere otherwise

[mikeyredtop]

suits me fine... i do 35k a year motorway miles

thats about 95 miles a day!!!!!!! and thats just the moterway!

[Ste_Nova]

yup between mot's i did 47k last year

[Will]

yeh if you want a good job you have to be prepared to travel imo

i drive 600+ miles minimum a week. :D

[Ste_Nova]

yeh if you want a good job you have to be prepared to travel imo


:roll:

http://uploader.co.uk/images/stemap.jpg