im thinking of putting a 2.9 v6 cossie bob engine in my saph.....
got the engine already but what i want to do with it is,

lightened and balanced crank, conrods and crossdrilled pistons
bored out to 3.0
skimmed head
port flowed head
timing wheels
6 jenvey itb's
2 short exhausts

dont know what to do about the ecu yet (any tech heads please let me know), but, any ideas what i can expect to see on the rollers?

many thanks

 

what rpm are you looking at going to?

if its only 6500, then the standard rods will be fine with arp bolts
make sure the pistons have wrist pins small enough to be able to use the standard rods with the little ends bushed and go from there

should be good for at least 250bhp with the right size injectors and the ITB setup

 

i wanna make it safe to rev maybe to 7 or so
but my target is 300 really so what else do ya reckon i need to do?

 

Don't realy know much about tuning so forgive me if you think it's wank but maybe injectors and a remap would help?

 

i can see a lot of expense/work etc and you may not hit the 300 bhp mark,imo better off just buying a cossy lump

if you wanted the 24v'er propebly better to basicaly keep the engine stock wack a tubo onit and run it at low boost like 7-8 psi probebly be hitting around 300 with that

 

7k in any cologne lump needs a main cap brace really, as the blocks throw a wobbly generally

as said, if you want 300bhp, low boost turbo is the way to go

 

as already said these engines are fairly easy to stuck a twin turbo set up on for most likely les than keeping it NA. again if you put low boost up to about 8psi then stock engine will be fine and should see between 300/350 BHP

 

Look up Damcos on here he has single turbo BOB in a silver saff with a very healthy output saw it up the ace cafe last Saturday, very nice. Mike at boost performance can help with the girdle

 

can i get these bob cams reground or summin, for extra torque?
cos id like to keep it n/a...
what about makin it high compression?
or dry sump?
i just wanna get the best out of n/a and i think 100hp per litre is pretty good going
........also... if i get some kinda decent ecu for the itb's (dont know what one, but the cossie stuff is going in the bin), can i get the engine running myself or is it a bloody knightmare where i need the pro's to put thier tools on it. (i have a lot of tools but not done this before)
cheers guys

 

You will be able to get it running on the base map on something like emerald fairly easy then tune it with a lambda hooked up to the ecu .

 

i wouldnt bother with na if you want 300bhp - it will cost you far too much for not much gain

 

for the amount it'll cost to see 300bhp n/a, you'd be better off buying a brand new 302 or 351 crate engine....then you'll have 4/450bhp n/a ...not to mention the NOISE

 

as some one with a fooking expensive build of a BOA in my old ford, id go with this!

regret not going down the v8 route, and they can be made significantly lighter than the cologne boat anchor with a change to alloy heads

 

i need to weigh up the pros and cons of turboing this bob lump,
it would appear the engines are good for it as standard providing i have the right ecu.
ive tinkered with turbos before but never actually had one let alone built one.
as said im looking for about 300hp and preferably a lorry load of torque to go with it.
i dont want to just bolt a turbine on it, simple as... im gona strip and rebuild this with a few mods that i know work having built other engines.
i'd also like it to have an element of economy in it (maybe 2 different setups on the brain), purely efficient running stuff, not balls out maximum gains.
so what do i need???
obviously 2.8fly and 2.8gearbox
what turbo, ecu manifolds etc

 

been there done that

if you want a cheap 200bhp engine in a sierra use a std bpb

if you want more power and care anything about value, look at alternative engines

 

2.8 gearbox is going to shit itself royally with 300 bhp going through it. I'd suggest the MT75 as it's stronger. The ratios aren't so nice but you can't have everything. 7000 rpm from a Cologne will need a main cap brace as said, as well as ARPs. With a lot of mods, 300 is achievable but it is probably cheaper to twin turbo it and keep the revs down to standard.

 

i gotta be realistic now... and money isnt excactly my strong point...
i would've liked jenvey itb's but i can see a massive holes gonna turn up in my bank and it might get bigger and bigger.
so... i'm gonna do as much as i can mechanically to it myself and settle with carbs.
lookin around, i can see some people have done it with 3 webers (42's?)
but i cant find much out about it...
what carbs can i use?
what manifolds?
and what do i use to sort out the ignition timing?
im fine with wiring but i have a bit of a "modern digital shit" disliking and i'd like it if i can go down the carbs route, even if it turns out not to be the best.
many thanks chaps

 

if money is any issue at all, DO NOT MODIFY IT!

please trust me

honestly mate, £ per bhp they are extremely expensive to get any gains out of.

i spent a fair ammount on mine and it was less than 10bhp over standard, and i prefered driving it when it was standard

 

My mate has a boa with the bits you have said u are planning on getting and it's 277hp with emerald management.

 

and how much did it cost to build out of interest?

 

i was probbaly most happy with mine with simply an exhaust, chip and filter. plenty quick enough and drove well throughout the rev range.

standard manifolds, standard management, standard cams TB etc. cost $$$ and made a tiny bit more peak power whilst sacrificing driveability and midrange

had an MT75 RWD on mine

the 300bhp NA figure is aceheiveable with the bits mentioned, but those bits cost probably twice as much as almost any other engine that'll drop in a sierra and do 300+bhp

 

Fair enough... i aint gonna see 300 am i ? !
And i want to keep it semi reliable with weber carbs on.
I'll lighten the +1mm pistons and grind off any excess metal on the rods (balanced of course) with high tensile nuts and bolts etc
Balance the crank (possibly lightened aswell)
Skim the flywheel and balance it
Grind and polish up the ports in the heads and skim them for slightly better compression
Grind some out of the exhaust manifolds, and hoping to get some side exit high flow jobbies made up for me
I'll cut a hole in the bonnet for fresh air on the carbs
And i need a modified piece loom for the ignition which ive not really looked into yet... thats questionable at the moment
But after all this, am i still lookin at pretty standard output or do you think it'll unleash?
cos i did all this to a 1.8cvh in a xr2 years ago and it was pretty mental, almost dangerous, lighting it up in 3rd off roundabouts

 

i forgot to say the performance bearings

 

stock 2jz would be my choice, bullet proof 320 hp stock tune to over 400 hp on all stock parts, engine around £1500

 

i know these are good engines ive read all about them and ive seen one running 1000hp up santapod.
but this isnt what im lookin for im afraid
ive already got the cossie v6 wrapped up in my shed
i just need to pull my finger out and get it done
but i dont want to dive right in and do something i later regret

 

ok thats fair enough just dont put to much money into it, i only mentioned 2jz purely from the pound to hp point of view, £1500 will soon disapear trying to tune an n/a to big power, my mate did with a crossflow and alot more money than im talking about here and came out with 144 whp !

 

Is the engine needing a rebuild? If not just get it stuck in, there has been enough people here tell you that your planned mods are a waste of money!

Also is the car ready for the engine? Uprated brakes and suspension? What about the bushes, still 20+ year old ford stuff? Even think about the tyres, 200bhp of a set of the finest hedgefinders isn't going to be much fun!

 

LOL!
for reference i recently bought and fitted spax adjustables -40mm
modded t.c.a's to make the bushes tougher and almost unsplittable
a.r.b bushes modded to be tougher
custom drilled disks all round (260's and 273's) with red stuff pads
avon 205/17 rubber
i dont plan on using all the power of this engine to its best potential on the road i just dont hang about if you know what i mean. at the moment the only thing that holds the car back is the lack of grunt. it stops and corners quite well

 

if thats the case, just get the BOB freshened up and fitted and enjoy it

just watch out for the chain guides if you strip it fully for the rebuild

the standard BOB cams will be fine for road use, and provide enough low end torque with the variable inlet. i'd keep to the standard injection setup if you can, and use a BOA loom and ecu with a RPM switch for the VIS part of the inlet manifold

 

take the engine out of the shed, put it in the car, drive it, enjoy it.

i've been there, done that and i WISH someone had bitchslapped me before i spent 30k on a sierra with a v6 in it!

 

as said , just stick it in
dont go wasting money on rebore,pistons etc etc
for not alot of gain for the money
id just put a good exhaust and filter on it then a remap or chip

 

I agree just use it as is.

30k how did you manage that, could you break that down?

 

Fair point chaps... i was hoping i could achieve better than standard cossie power with not too much difficulty.
I can do all the mechanical stuff myself, thats why i wanted the carbs, but i could use the standard setup however the loom was melted and i'll have to get a replacement now if i go down that route.
I just figured seeing as i wanted to take it apart and overhaul it anyway it'd be worth putting some better stuff in cos i could be more proud of it.
I dont like doing things half way and then wishing i'd done more.
I did that with my xr2 home modified 1.8cvh, i could launch to 60 in one shot in 2nd, but, i should've turbo'd it with hindsight.
But hey, 200+hp in a sierra's gonna be fun innit!

 

ive got a boa in my two door MK5 tina and it dosent hang around by any means, im a slightly spirited driver like yourself so at the most i would say the same as above freshen it up got for a system some induction and maybe the vectra injectors for a better spray pattern, plenty of useable grunt and you can hammer it without it going pop.