VTS engine mods

11th February 2008, 00:30

im doing a VTS engine coversion on my vtr in may and im rebuilding the engine at the moment.

whilst the engine is in pieces i figured it would be a good idea to tune it whilst its out of the car and whilst the head is off the block.

my plans were:

ported and polished head
4-2-1 gmc manifold with supersprint centre section
cat cam 708s or similar
remap once running

these mods any good ie

ro's or cons, ok for everyday use?

will i pass and MOT ok with 708's witht the cat in just for MOT.
what kinda of power/ torque should i expect with these mods.

i have searched btw but was after an answer perfectly relevant to my engine.

any CONSTRUCTIVE help appreicoated and repped.

cheers

11th February 2008, 00:46

i have got my caar running the same spec as yours mate and its fine for everyday use!! also as far as i know it passes mot fine when you've gt a remap done on it!! an finally your going to see somewhere within the region of 150-160 bhp depending on which rollers you take it to!!

hope this helps!!

11th February 2008, 01:11

where did you get your head done at and how much was it?
what cams you using too

150-160 would be about perfect

11th February 2008, 10:07

We provide cylinder head porting and polishing

£250-£500 plus fitting depending on the condition of the head.

Ross
RCD Performance.

11th February 2008, 10:18

well its not warped, of a 43k engine

does that narrow the price bracket down a bit.

11th February 2008, 10:35

depends on the condition of the seats, seals etc.

Cant really tell until you look.

But will morethan likely be the lower end of the price bracket.

it basically works £250 is no rebuild work required at all

£500 completely rebuilt head.

11th February 2008, 10:43

thats ok then, id imagine mine shoud be fine. thanks for that.

11th February 2008, 10:54

No worries

11th February 2008, 11:02

Its just me but i would wait to put the cams in After i had the standard lump running.

It may be fine but cams run lumpy as hell which could mask another problem with the engine.

Did a conversion once and it was running like poo. Ended up having to change the coolant temp sensor, tps, lambda and crank pulley. Pain in the arse.

11th February 2008, 11:03

id put a fast road clutch/flyweel combo into it while the engine is out

11th February 2008, 14:01

i see where your coming from, may well do it this way

fast road clutch - recommend a brand?

flywheel - you mean like a lightened and balanced one.

11th February 2008, 14:05

ross, how much would you charge for a VTS engine change into a VTR with you doing all the work required and i provide you with both cars... VTR and VTS?

11th February 2008, 14:06

the VTS engine has kent cams and standalone ecu and some extra things on it by the way so its pretty quick

11th February 2008, 14:49

"Fast road" clutches are not worth the money. A standard Valeo one will do really well upto 170bhp-ish. After that your looking at £500+ for a decent clutch and fly wheel to suit

11th February 2008, 22:18

are "WE" port polishin your head??? or just you by you self?? lol i wanna get my hands dirty

12th February 2008, 13:43

lol, pervert.

im sending it off somewhere. just not to LAD

12th February 2008, 13:51

if youve opened the engine up, think about putting some high comp pistons in, will give you a bit more midrange torque

12th February 2008, 13:59

would be nice but its getting expensive already and ive gotta drive this everyday, and you have to use superunleaded all the time with highcomps.

will probs do it later.

12th February 2008, 14:24

different fuel? :|

who told you that?

12th February 2008, 14:43

no you dont not at all
hich comp forgies just give you a better compression ratio
there a good buy they give awesome midrange if fit

12th February 2008, 16:09

cant remeber where ive read it, sure you do
or youl get detonation?

maybe misinformed

12th February 2008, 16:34

you will only get det if its not mapped properly - are you going to be getting a remap or standalone?

obviously if you just whack the high comps in then run standard ecu and map, you're gonna have problems

12th February 2008, 16:38

Quote:

Originally Posted by VtsTom

"Fast road" clutches are not worth the money. A standard Valeo one will do really well upto 170bhp-ish. After that your looking at £500+ for a decent clutch and fly wheel to suit

I completely agree fast road clutches are shit i blew mine within 5 runs at pod, by £400 clutch.....

12th February 2008, 16:44

vtr 130 what clutch did u blow at pod mate

12th February 2008, 17:05

Organic helix gay clutch!!

12th February 2008, 17:11

You blow any clutch if you abuse it!

What was your clutch rated too vtr130?

12th February 2008, 17:12

Not sure about the rating mate, well above 200bhp!! Abusing its meant for that!?

Just couldn't take the launch i dont think....

12th February 2008, 17:59

i run a valeo none sprung paddle clutch an have done 1/4 miles an track days for over 2 years in know im only running 160bhp but i have never had any problems not sure about helix mate

12th February 2008, 23:28

rang LAD in morecambe today for a price on head work,

£550 for bigvalve head with setup and remap - sounds good, right up until the moment hen i said it would be cammed and then he said there bad and arnt effective.

then he made matters worse by saying the headwork with a 4-2-1 manifold would make 170 bhp once set up. with out cams

my fucking arse mate.

might guinea pig this company as i believe there work performs well however they let them selves down with optimistic power gains.

will get it rolling roaded at another garage afterwards.

any opinions on this

13th February 2008, 10:41

LAD are shite, avoid

13th February 2008, 11:01

Stay away!!

13th February 2008, 11:08

I don't know if we would do that mate, because we would have to dispose of the other car and all the unused bits.

If you dropped of two cars, and picked up two cars then yeah no prob.

About 10 hours work, £400.

Plus any parts we use

Ross

13th February 2008, 11:10

Opps, bit late with that post, heard /bad things about LAD motorsport.

VTR130, if your clutch is rated properly, it would handle the launchs, oviously there will wear it quicker, but if your clutch is rated higher than your engines output, then it should have not gone so quickly. Also, its nothing to do with HP clutches are rated on torque.

13th February 2008, 11:11

a decent flowed head will cost you 600 - if they dont ask you the spec of what you're gonna be running, then steer well clear. the headwork will be done specific to the cams etc you're running.

13th February 2008, 14:38

LAD did ask actually,
however he was tranna bullshit me with HP figures and that put me off.

even more put off when he said you wont need cams, the standard ones are brilliant.

Ross - give him a call just for a laugh and make a tit of hime for me, see what you can dig up - 01524 62748

im beinnning to think i cant afford this unless there really is nothing wrong with the head and the work needed is minimal as you explained earlier.
£400 would be about aceptable for me.

as im gonna run standard cams for a bit to check the engines running ok and to get it through the MOT, will the emissions be ok and will it run ok for a while till i can afford cams and remap.

13th February 2008, 14:41

theres no reason why 708's and remap wont pass mot if you put the cat back on

headwork can give you an extra 10bhp if its done properly, which isnt too bad for the money

13th February 2008, 14:44

yeah ok then, youl probs here from me in the near future RCD, does the £400 include postage back to me?

PJM- i think you misunderstood, im gonna get the head done whilst its off, then im gonna rebuild the engine and get it running on the standard cams as someone said that uprated cams could mask running problems and its a bitch tranna track down a rogue sensor when the idles bad anyway if you see what i mean.

so the Q was will the P&P head work and idle well enough to pass an MOT with standard cams and no remap?

sorry if im hard to understand - i am northern you know.