1.4 sr 120bhp?????

[mr_05]

i have read on this site that its possible to get abot 120 bhp out of a 1.4 sr nova ,has anyone tried this how much money and time did it take.Plus was there torque to match....if so what parts were used.....

[Nick]

i can't think of any examples, but it's achieveable. benji has 109bhp or something like that... obviously the torque wouldn't be 120, but it'd be reasonable

You need to be roughly looking at

T40's, A good amount of headwork (sri head, B+ big valve head e.t.c), Bottom end work,

it wouldn't be mega expensive, but it wouldn't be cheap and easy as you'd think.

[dunova]

If you're looking for good power gains, firstly swap your sr head for an sri head, much better flow. And as Nick said, twin 40's or throttle bodies are a must, aswell as a lairy cam. Also, rebuilding the bottom end (new rods, re-ground crank, lightened flywheel, block re-hone etc) will bring back some of the engines original life and the flywheel will take you through your rev range quicker.

[Nick]

and if you going for a peaky power cam, and wanting to go through the rev range quicker, it'd be a good idea to get the rods shotpeened balanced, ARP rod bolts and the engine balanced.

to ensure everything stays confortably where it should be when hitting 8k lol

[hendrix]

my mate was apparently gettin 105bhp from a piper cam, some aftermarket carb - dunno what it was but it wasnt the normal webber or pierburg and also a rebore to roughly 1500cc. i suppose that defeats the point of it being a 1.4 i guess :roll:

[Nick]

new rods.

oh and as for New rods, you'd only need them if the old rods where in a bad way. As for upgrading... a set of steel rods would set you back ?700ish or something, and really are only needed for running 350bhp+

standard GM rods are good for 150+ but balancing as a set can do no harm

[dunova]

..Sorry meant to type pistons :oops:

[mr_05]

cheers for the reply,but more info would also be greatful need,im lookin for the simplest way and cheapest way to achieve around 100-120 :D bhp......cheers

[Stuart]

simplest, cheapest


N2O plain and simple

will get your 120, or more.


if you want to not h ave nos you will need

1.4sri head worked to fcuk, big valves, 300 degree cam, matched T40 manifold, T40's, 4 branch exhaust, over bore, high compression, L&B bottom end, de seamed and shot peened rods, ARP rod bolts

that will probably cost ?1200-1500 to get built and setup

[Snowface]

the chap i bought my 1.6 engine from had a 1.4 running 120bhp @ fly (104 at wheels i think).

He was telling me about it, got an sri head, 40's, ast2/3 cam, arp bolts.
he does tarmac rallying with it.

[mr_05]

cheers all posts still welcome tryin to get as much info as possible!!!!!!

[General Baxter]

or do what im doing :)

i picked up a reno5turbo inlet manfold and carb on sat :o and some welding wire :lol:

[Snowface]

hate to piss on your fire but its even worse without a turbo to go with it lol.

Joking.

[General Baxter]

hate to p**s on your fire but its even worse without a turbo to go with it lol.

Joking.

duh!!!!!!!!!! :lol:

[NovaloadedAgain]

I Had a R5 GTT, & I dont care what you say it was a great car! No probs for 2the 0,000 miles I had it! Had 130k when I bought it! Good luck Baxter.

My car has a figure of 100bhp at the wheels, & roughly 115 at the flywheel, That was a while ago, so dont quote me, Could be completely wrong-But mines quick.
Ive spent about ?1000 on my engine, It was rebuilt about 6k along with the addition of a low mileage 1.2 head before I bought it, Ive added twin 40's, 285 fast road cam, A 4 branch to go with my full SS magnex system.

2 seats...Roll cage soon I hope.

[hendrix]

Twin Webber 40's with trumpets and 32mm chokes
Piper cam over 275
Ported, skimmed, gas flowed head
Full stainless exhaust, 4-1 manifold
that shud get about 120bhp
prob 95-99 at wheels

[NovaloadedAgain]

Thats exactly what Ive done. & Its got just over 100bhp at the wheels. I cant remember the flywheel figures but should imagine 115-120bhp.
Its very quick, I jus need to modify myself & it will be quicker-LOSE WEIGHT! lol.
Abit of subject I know but, BHP figures & acceleration can be improved by the choice of tyres you have, Im looking to spend about ?200 ish for all new tyres, I want 195-45-15 tyres, I think I put that right! What tyres should I get?

[Nick]

1.4sri head worked to fcuk, big valves, 300 degree cam, matched T40 manifold, T40's, 4 branch exhaust, over bore, high compression, L&B bottom end, de seamed and shot peened rods, ARP rod bolts


i'd listen to cambridge on these things, as he really does know what he's on about...

[General Baxter]

Good luck Baxter.

luck i dont need luck, im just gooooooooooooooooooooooooood! + i have a hammer :lol:

[mr_05]

what u clocked in that, a m8 clock 130 in a 106 xsi,bout 110 bhp with full system and induction kit + it had just been remaped,was hoping for about the same performance a bit more actually to p**s him off lol

[NovaloadedAgain]

I clocked 132mph, But I know thats well out....Its a nova! & Before anyone says anything its a digi dash-But thats doesnt make it 100%.

[Nick]

it makes it a damn site more accurate than normal clocks

[NovaloadedAgain]

Lol, I have to agree. But still mate you can see what Im getting at cant ya...132mph!!! C'mo. Even I laughed. Of course on a private road.

[Richyb]

Mine stared out life as a 1990 1.4sr, i tuned this about a year after i had it, using a sportex exhaust system, using second hand twin 40's which i got for ?230 a courtney weber carb cam which cost me about ?105 or less i think then i had the head proted and polished by some guys that just novas know for about 250 then a absoulte must beacuse the carbs need to be set up for your engine......i had it tuned at mikeanicks rolling road i still have power sheet in front of me:

Peak Power: 112.4bhp@6127
Peak Torque 108.9lb ft@4549

When the nova was stripped out inside this was a very quick and revvy little car! The rolling road tune costed me 140 because the carbs needed to be jetted and set up correcty and i think the guy had it on the rr for 2 hours or so. I also brought a set of 2 bolt on k&n filters but took them off becuase you really do lose power ( it depends how long you want you lump to last)

So to recap

Exhaust 220
Used Twin 40's 250
Ported and polished head 250
Courtney High lift cam 105 or less
Tune on rollin road 140 or less
Total: 965!!! i didnt realise it cost me that much but it was bloody quick when i was 17 and i declared all the mods with the underwrighters at cis even though the insurance was in my mums name!

If you go down the nitrous route ( i have done both ), a nitrous kit for a standard 1.4 single carb lump will set u back about 500-600 quid, unless you want to fit it yourself you will be looking at another 300 for fitting and setup, then your refills all the bloody time!!!

I used nitrous on my highley tuned 2.1L turbo as a method of getting rid of some of the lag as well as a nice push button boost at higher revs, it worked well when the bottle was warm but there is not point in unsing the gas unless you have the bottle at 800psi or more. i imported a Holley nitrous kit for the usa just like the 1 seen in the original fast and furious, you could buy a bottle heater and pressure gauge but it would have cost an extra 300 notes!! when ever i new that i was going to b using mine, i would simply leave the nitrous bottle by a radiator in the house for an hour or so then connected it back up to the line and away i went this worked okay but it was still dodgey. most people prefer the roar of n/a tuning and i think you will be much better off going down this route.

If you have any problems or quires your best bet would be to get in touch with justnovas, they will be able to tell you pretty much what ive just said and may even have a set of second hand 40's!

www.justnovas.co.uk

the other guys are velos, they can race tune a 1.4 engine up to about 140+bhp be using 1.2 pistons, big valve head and other custom bits and bobs! They take there vaux engine very seriously, it will cost you though!! they can be found at:

http://www.velosmotorsport.co.uk

I hope this has helped 8)

[Nick]

1.2 pistons ?

[Richyb]

indeed they do use 1.2 pistons becuase the piston is actualy wider in diameter than the 1.4 piston, this is becuase the stroke on the 1.2 is different to the stroke on the 1.4 therefore they will rebore the 1.4 lump to except the slightley wider 1.2 piston and together with the 1.4 stroke this will increase the displacement to just under 1500cc i think.........check it will velos im 90% sure thats right.

[Stuart]

they hybrid engiens arent as revvy due to longer strokes etc.


oh and velos dont exist any more, unless you want some wooden stuff made lol