GROUP A

Hello all,

on one of my RS Builds i bought a Kent cam for the engine years ago, the rev limit is around 5.50 to 5.90 x1000 revs.

i was told that the rev limit is determined by the Cam your using, if so whats the best cam to get so that i can take the revs to 7 - 8,000 revolutions a minute instead of 5,500 per minute.

i've heard of NEWMANS but im not very knowledgeable about these things and its been on my mind as to why the revs arent higher ?

any help or suggestions welcome on this.

Thanks in advance

Rob_DOHC

iTrader: (4)

Not too accurate im afraid mate.

Ultimately your con rods will determine your rev limit. If you are on standard rods i would highly recommend a maximum rev limit of 6500,

However, unless (as you say) you have a suitable cam, and a well ported head your power will start to tail off after 5000 rpm, so a rev limit of 7-8000 rpm would be pointless.

Rob,

GROUP A

thanks for the reply,

so its the rods that determine the rev limit ?? the rods in the car are sweedish motorsport H section rods.

is there no way of getting more revs out of it or at least to 7,000 rpm

stuart collins

iTrader: (7)

is it mfi o r efi , if its on a mappable ecu u can have it mapped for more revs , its just if there is any point , if it stops makin power at 5.5-6k whats the point in puttin more stress on everythin reving to 7-8k

GROUP A

hello,

thanks for the input. its EFI and it does have a mappable ecu, in your oppinion with Forged H section rods, forged wassners, machined head etc, would 7,000 be ok or would 6,500 be better do you think.

thing is i dont quite understand where you say " if it stops making power " do you mean when the limiter comes in ?

if so this is what i want to change, id like the limiter to come it at 6,500 - 7,000 but just trying to get the most out of the engine ?

im not majorly mechanicaly minded and i dont know ratios etc of it all, but from your reply i might look into getting it re set to go to 6,500 - 7,000 area as the rev counter isnt being used past my previous settings lol, in other words whats the point in having a rev counter with red line marking when it doesnt go near it ?

dont get me wrong it is very fast but i would like just that little bit more out of each gear.

Thanks

Rob_DOHC

iTrader: (4)

If they are good rods and your car is mapped for it 7k should be a max limit, 6800 would be a safe limit, you ecu may need its rev limit changing/mapping upto 7000rpm.

Rob,

stuart collins

iTrader: (7)

what is the spec , who eva is mapping it is the best person to ask where your limiter is at

Karlos G

iTrader: (4)

What Stu means by 'not making power' beyond a certain RPM is that you may make peak power (BHP) at say 6000rpm and after that it starts droppping off (bigger turbo needed, more agressive cams, head work, etc..) so there is no point raising your limter above this as all your doing is putting lots of strain on the engine internals and turbo, getting things really really hot, but gaining no power at all....
You will not know how and where your engine makes power without a dyno run, at this point if your tuner thinks you will continue to make power with an increased RPM limit then you do so, if not you leave it.

GROUP A

NICE !!!

ok so i will look into someone doing the map for me, i have faith in the rods and pistons ive got.

i just glad to know the limiter can be changed by the ecu and i dont have to buy another cam lol.

Thanks alot this helped massively

GROUP A

Thanks matey,

advice appreciated greatly, looks like i will talk to a tuner more in depth lol ( opens wallet ) lmao

stuart collins

iTrader: (7)

what cam do u have

studabear

And what management are you using?

GROUP A

i been getting bits on nthe engine done for years now the spec as i know it to be is

1.6 Block ( machined , whatever lol )

RS turbo head ( ported, polished, etc )

EFi Manifold ( looks slightly different to a normal one, the throttle cable is in a different position but thats how it was fitted, i think the throttle body might be the reason )

Wossner High Performance pistons ( cant remember the ratio's but they have been machined for low compression)

Sweedish Motorsport H Section Rods ( Shot peened )

P8 ECU ( i got through a mate of a mate who said it's a good management system ,so i'm guessing it can be mapped ? )

Stage 3 Hybrid Garret Turbo ( got it ordered in from Turbotechnics 5 days ago, has 360 deg thrust baring, dont know any ratio's etc will have to check their website again )

Internal Wastgate ( nice flutter on low revs and high pitch squeals on high revs lol sounds great, i think its a 34 actuator but might be no such thing lol )

vernier pully

Kent cam ( cant remember which one etc ratio's )

sierra 1.8 CVH alternater on it

Machined Hybrid 1.8 Wheel.

Magnecor HT Leads ( recently perchased )

Baily Swirl Pot

Bailey Oil Separater

Bailey Header Tank

Samco and Roose Motorsport Hoses.

Rising Rate Fuel pump regulator

Standard Fiesta RS Turbo Fuel Rail

Green Injectors

Competition Fuel Pump

Standard RS Turbo Fuel Filter

3 Bar map sensor ( no idea what this means but was told it has it with the ECU etc )

4 Padel Organic AP Racing Clutch.

It runs fine at the moment, i havent had it rolling roaded or mapped though so no idea of HP, i suppose when i find a tuner he can sort that out !

I dont use it as an everyday car as like i said its been getting bits done for years now and i only take it up the road to run her about every now and then on nowhere roads, but its coming to the point where i need to start finishing her off as id like to get her on the road properly but i just want the revs to do what they are supposed to.

Thanks for the help anyway

oh i forgot some bits, it has GRS intercooler and radiator ( recomended to me by a friend who used to have a quick RS turbo, he said they are expensive lol HE WASNT WRONG !! but it seems they are for heavy duty cooling which i suppose is a must )

GROUP A

i bought the cam years ago, its a Kent Cam but for the life of me i cant remeber what sort or with any ratios, i cant even attempt to find a recipt its probably lost lol....but it is a kent cam because i remember buying it, to start with i had to ask people about it, i thought kent cams was a place not an actual cam lmao.

but none the less its a Kent cam lol

GROUP A

i used to be on the cabriolet club owners sight and the info on here is ten fold compared to theirs lol.

Canada1

The ability for any engine to rev to a certain rpm is dictated by valve spring pressure. the ability to control the valves and keep the lifters following the camshaft profile. In many cases people often assume a low revving engine to be the poor head flow. This is just not true. It is the valve springs losing control of the valves, preventing further revs.
A solid lifter camshaft with correct valve springs will rev well over 7000 rpm with a standard (poor flowing)cvh head.
A poor flowing cylinder head and a short duration camshaft will limit peak power production, but the engine will still rev much higher than peak power.


What valve springs are you running? New Factory Ford ones are better than some aftermarket springs. However, 20+ year old factory springs will not be up to the task in any high rev application.

studabear

similar spec to this don't you think??????????

Hello all,

I was wondering from anybody's experience what sort of BHP i will be running out of my Escort with Cossy management.

I have yet to have her in for a power run But was wondering if anybody had a rough idea off the top of their head.

SET UP :
1. Cosworth P8 ECU with Pectel Board Running ALS ( ANTI LAG )
2. EFi Conversion
3. Wassner Forged Rods and Low Compression Pistons
4. Garret T3 Hybrid Turbo with 360 Degree Thrust Barring, Internal Wastegate
5. Skimmed head, ported and polished
6. Cossy Bottom End
7. Coil Pack
8. 27 PSI Boost Pressure ( holds on the button )
9. Green ( 806 ) Cossy Injectors
10. Cosworth Throttle Body
11. Group A Induction Kit
12. WRC Air Injection
13. Magnecor HT Leads
14. Full Stainless 3 to 5 " Rolled out Exhaust System, DE CAT, STRAIGHT PIPE
15. Billet Crank
16. Kent Cam
17. Uprated Valves and Billet Springs.
18. Cosworth Competition Fuel Pump
19. Cosworth WRC Competition Fuel Pump Regulator ( Rising Rate FPR )
20. Cosworth Fuel Rail
21. High pressure Braided Hoses All Round.
22. ProAlloy Radiator
23. GRS Motorsport Intercooler

GROUP A

yah its pretty similar to that but i dont have a pro alloy intercooler, i dont have a billet crank, i dont have a cosworth fuel rail, i dont have group a induction ? lol and i dont have anti lag, wish i did, who's car is this then ? i see this post when i first subscribed here, my fuel pump is just a normal Fuel pump but has rising rate its not wrc as far as im aware.

when i got my ecu after i had started building the engine i was told to go EFi, it seems this guy has quite alot more than me in turms of parts but yah its sort of similar to my one but without half the parts also to my knowledge the valves and springs in my engine were just cleaned not upgraded

luke19790_3

sounds like the same guy, but its not

GROUP A

i just did a bit of searching on the net, anyone know of a good tuner who could look at this rev limit set i need sorting.

i left a message on the page of the person with that spec rmnlwln or something with the spec you posted, nice colour car, yah looking at the engine pic hes got i can see straight away i have the same Inlet manifold but the other parts are different, not too far off but not exact. He must of spent a few quid lol billet cranks are over a grand alone arent they.

all im after is to get somewhere repretable to set my revs properly as long as my Kent cam does the trick ill be happy but lets see what he sais when i get to doing it.

GROUP A

Thanks for the info,

Yah the springs are just standard i think, ill look into this also, i got my pen and pad out now.

so its worth looking at the springs and stuff aswell, are they expensive ?
alaso if i change them its going to effect anything else other than the revs, ie change how the ecu reads the car as it runs at the moment ?

Karlos G

iTrader: (4)

Not only a very similar spec but they both manage to mispell Wossner too....

GROUP A

wossner is the correct spelling isnt it ? lol you made me check it and it is spelt " WOSSNER " i just been on the web a checked.

http://forged-pistons.co.uk/

stuart collins

iTrader: (7)

get another cam i bet yours is fucked, and get some pics of the car and engine up

stuart collins

iTrader: (7)

this could be the new D4 RST

GROUP A

im sorry but WHAT IS YOUR PROBLEM, have i done something wrong ?

what the FUCK is a D4 RST ?

why do you need to see picures, the engine is sealed im not going to take the engine apart just to take a photo of the cam for you am i you PRANNY !!

i been opn here a couple of days and have a guy called luke and you talking to me like a peice of shit and insinuating im some other c**t, what the f**k is your problem ?

for your information i will get pictures of my car but not for you, but for my profile, ill even throw some in of my jag for good measure eh ? sort yaself out chap

stuart collins

iTrader: (7)

lol , i dont have a problem maybe u are the 1 with the problem , thats why u are on your 3rd user name
, 1 your cam is years old as u said and 2 its a kent which wear quickly and a lot of peole have problems with them , so its probly fucked so u need to get a new1 if u want power and to rev it , i asked to see pics of the car and engine cos im interested , i dont want u take it to bits ???? not really interested in your jag tho

D4rst is a legend 80 page thread

GROUP A

3rd user name ? well how am i supposed to know what D4 RST is, i been here 2 days, ive not seen it, HOW AM I SUPPOSED TO KNOW, i just took offense to it because you seemed hostile to everyone elses post, almost like demanding to see pictures !

you will see picures of my car soon ill take some new ones tomorrow of it on the driveway and of the engine so that you can feed your interest as much as you like, FYI i have hardly driven the car as its been off the road for a while, i been adding bits for years, the only driving ive done is about 3,000 miles with the cam, so regardless of how old it is im sure a cam wont ware down after 3,000 miles wil it ? ive sent you a pm aswell asking about this problem you seem to have with me, because to you and 2 - 3 other people im some other person with 3 names or something?

trust me i do not have a problem mate, i just had enough already of the childish crap that keeps getting fed to me every time i make a post, there are people on this thread for example who have genuinely helped me out and because of other people like you its turned into some sort of bollocks because you " THINK what you THINK ".

i said it in my PM's to other people so i may aswell say it here, either way i'd like to make a post in the future without this shit happening.

1st of all, this rmelntgglnwnl person whatever the f**k his name is lives in Herne Bay, I LIVE IN LONDON !!!

hes 27 , I AM NOT

hes occupation is offshore, I'M A PLASTERER, unless there are plastering jobs offshore but i doubt it somehow.

Yes ok he uses a kent cam in his spec and the same ecu as mine, SO WHAT am i the only one with a p8 in an escort, i have mates that have the same as me for the love of F**k maybe youd like to tell them they are someone they are not ?

ever since i subscribed ive had stupid bloody pm's and questions, everytime i make a post its almost like your trying to make me slip up or something, the only thing i'm slipping on is bullshit, you ask for pictures of my car and engine bay because you want to see if its the same as the pictures as this other guy maybe.

what is this all about ?

why am i having to defend myself over nothing i have no control over, im not going to own up to something i havent done or to someone you think i am, who cares, id just like to look and post like everyone else without people coming out of the walls at me being childish, savy ?

stuart collins

iTrader: (7)

u seem to no alot about this other guy ?? i havent even seen pics of his car so how can i see if there the same , it makes no difference to me, u ask question about cams and u will better off getting a new cam , like a newman with solid lifts and a new set of springs , cant see why your gettin so upset lol

GROUP A

please dsont make me out to be some sort of mug, here is the profile not only tou are talking about but two ther people have mentioned about in the recent past, if you look on the info page it will telll you more than what i have highlighted, and im getting upset because ive had enough with the accusations on every post i make, I KNOW FUCK ALL ABOUT THIS PERSON other than whats on the profile cheers.

can we just drop it, im boired with this now.

here is what you are talking about, also you know more than me, its not me bringing it up its you and 2 others in this thread.


https://passionford.com/forum/members/35637-rmwln.html

if your genuinly helping me then thankyou, but i will say my cam cant be worn, its not made of butter, its hardly been driven as its not ready yet for the road.

stuart collins

iTrader: (7)

i would check it, also if u dont no what kent it is how do no its up to the job u need , i swapped my piper t2 for custom speced newman and with the newman i was still makin power at 7.3k, my piper wasnt worn just couldnt do wat i wanted it to do

GROUP A

like i said, the cam is pretty old, i have no way of finding out what is was, so other than springs and valves you recon a newman cam ? how much are they.......... THANKS for dropping the bull " really "

id much prefere these replies than the ones i been getting.

Java=Blue

how can this guy be MO..??

MO couldnt spell or use proper grammar to save his life..

stuart collins

iTrader: (7)

it should be stamped on the end of the cam

luke19790_3

my piper cam was stamped on the end

GROUP A

ok thanks.

which end is it stamped on ?

paul-h

My piper is stamped too! Just remove distributor and have a look!

Mo is now posting on the S2 section of the RSOC. . . Giving him the benefit of the doubt so far!

GROUP A

ahh ok, thats fairly easy to do without getting a mechanic involved lol.

who is MO ?

fogulbennett

Mo is a fucking cracker that has a supercars beating erst his heads up his arse tbh

GROUP A

LOL oh right,

there was someone similar on the cab forums, when it came down to actually seeing it race aginst anyone, he bottled it lol