what mods for a 1300s engine.

[Rickyb]

hi all im thinking of doing a few mods to my 1300s its curently a standard lump out of a mk1 astra but thinking of different carb, cam, four branch and what ever else to make it abit better what would your thoughts be what cam? and what carb etc?
and please no one say put a big block in it as im in to being diffent and having a 1300s in a nova makes me different haha.
rick

[Andy]

Twin 40's,kent ast2 cam plus headwork should see 100bhp

[Rickyb]

Twin 40's,kent ast2 cam plus headwork should see 100bhp

cheers have some rep'age

[Andy]

http://www.pngclub.com/forum/showthread.php?t=154130
thats a good idea of power figures for 1300 engines in various states of tune.

[Rickyb]

aye cheers thats a big help.
just been on the kent cam website how do you get prices?
also whats the best compony to get 4 branchs from?

[LEWI007]

Sportex make some nice 4 branch manifolds you can get them on ebay for 130 quid new.

[tom reid]

PM toymex on here, he had one that made 117 on the rollers, he still has a few of the bits.

[Cle]

i bought my 4branch from eurorallye

[garyc]

Has it still got the varijet carb on there? Someone told me they are good for about 125 BHP, which looking at the size is plausable.

Someone posted on here about those 4-1 manifolds costing 8HP too so stick with the std. I've got a 4-2-1 tony law manifold designed for the 1300 nova in the for sale adds.

[mk1nova_rich]

if you go the twin 40s route can i have your inlet manifold please? :d PM me

[Rickyb]

cheers for all your comments
rich we will see what happends but youve got first refusal.
gary i cant see how a std item can produce more hp than somthin thats made to flow better? also im heading to for sale area next ;D

[Andy]

thats just it,most DONT flow better

[paul james]

The standard 1.3 exhaust manifold (at least on the Nova SR) does seem to be a better design. Just look at them side by side, the standard one has two seperate pipes all the way down to the end where it connects to the rest of the exhaust system, whereas the 4 branches you see on ebay just have all 4 pipes meeting much earlier by the engine sump.

I bought a 4 branch for mine, and although I haven't had it rolling road tested, it felt down on power in comparison. I'll probably put a standard manifold back on mine, if I can find one in decent shape.

[Rickyb]

hmm i stand corected lol.

[SR-Rally]

buy my twin 40's, offplots grp a head. thats a good start. i've got a spare ashley manifold i may sell if i go through with going 1400 16v

[mk1nova_rich]

4 branches tend to make the engine a bit revvier at top end but you lose out on mid range torque which is where the SR item is better, especially if you have it matched to the head