Yb 550-600hp
25-04-2020, 01:52 PM
#41
Regular Contributor
How much head work is required? I'm currently regretting not getting some whilst I had the valves re-cut and new guides fitted.
Spec is :
6 studded 200 block,
WRC oil squirters,
Wiesco forged pistons,
Farndon std length conrods,
Balanced bottom end
std 2wd head, new valves etc
2wd exhaust manifold
4wd inlet manifold (thinking im going to need a 14mm spacer)
EFR 7064, T4 0.92
Link G4 Xtreme
1000cc EV14's
70mm DBW Throttle
COP
100m thick large tank IC (Airtec)
I think the exhaust manifold, plenum and headwork are my limits of hitting 550 (maybe even 500) other than that the spec is kinda there I think - oh might need cams now too. IIRC there was a pretty much standard escos with 490bhp? (just supporting parts like injectors)
Spec is :
6 studded 200 block,
WRC oil squirters,
Wiesco forged pistons,
Farndon std length conrods,
Balanced bottom end
std 2wd head, new valves etc
2wd exhaust manifold
4wd inlet manifold (thinking im going to need a 14mm spacer)
EFR 7064, T4 0.92
Link G4 Xtreme
1000cc EV14's
70mm DBW Throttle
COP
100m thick large tank IC (Airtec)
I think the exhaust manifold, plenum and headwork are my limits of hitting 550 (maybe even 500) other than that the spec is kinda there I think - oh might need cams now too. IIRC there was a pretty much standard escos with 490bhp? (just supporting parts like injectors)
)
The following 2 users liked this post by Martin-Hadland:
boost monster (26-04-2020),
stevieturbo (25-04-2020)
25-04-2020, 09:12 PM
#47
PassionFord Post Troll
For me you can’t beat the power delivery of a 4 cylinder turbo 
25-04-2020, 09:15 PM
#48
10K+ Poster!!
iTrader: (4)
Oh but you can, just double the exact same spec into a 4 litre V8, the same engine characteristics but twice the power 💪👍
I love ybs that's why I bought another one, but they can be beaten very easily nowadays
I love ybs that's why I bought another one, but they can be beaten very easily nowadays
25-04-2020, 09:16 PM
#49
Shimmed correctly solids can be quieter than hydraulics.
Steve
25-04-2020, 09:24 PM
#50
Mine is being built by Mark Shead seen similar spec engines making high 600s, sure Dave Pritchard is running 755hp on similar spec engine, Im starting off with less hp maybe around 450/500 but safe in the knowledge I can easily make more if I wanted
200 block
ductile liners
CP short pistons
Carillo long rods +8mm
standard grind crank
cnc ported head and trumpets
marks own long studs
wrc head gasket and cometic gaskets
big wing sump
custom cams
piper double springs
arp main studs
and modern ecu ect, obviously loads of different ways to skin a cat. Ive read if guys running standard rods at 600 but Im too parra for that
200 block
ductile liners
CP short pistons
Carillo long rods +8mm
standard grind crank
cnc ported head and trumpets
marks own long studs
wrc head gasket and cometic gaskets
big wing sump
custom cams
piper double springs
arp main studs
and modern ecu ect, obviously loads of different ways to skin a cat. Ive read if guys running standard rods at 600 but Im too parra for that
25-04-2020, 09:25 PM
#51
PassionFord Post Troll
For me that sound nothing sounds like a yb
26-04-2020, 07:11 AM
#55
Hydraulic follower has an oil filled/controlled piston, with an increase valve opening force/pressure with either single or double valve springs, the oil is squashed out of the follower, reducing valve lift, reducing engine performance,even with high pressure/high capacity oil pump, also as the viscosity of the oil decreases with the increase in temperature the pressure within the follower can be reduced, which makes the increase spring pressure problem worse.
Steve
26-04-2020, 07:14 AM
#56
26-04-2020, 07:39 AM
#58
How much head work is required? I'm currently regretting not getting some whilst I had the valves re-cut and new guides fitted.
Spec is :
6 studded 200 block,
WRC oil squirters,
Wiesco forged pistons,
Farndon std length conrods,
Balanced bottom end
std 2wd head, new valves etc
2wd exhaust manifold
4wd inlet manifold (thinking im going to need a 14mm spacer)
EFR 7064, T4 0.92
Link G4 Xtreme
1000cc EV14's
70mm DBW Throttle
COP
100m thick large tank IC (Airtec)
I think the exhaust manifold, plenum and headwork are my limits of hitting 550 (maybe even 500) other than that the spec is kinda there I think - oh might need cams now too. IIRC there was a pretty much standard escos with 490bhp? (just supporting parts like injectors)
Spec is :
6 studded 200 block,
WRC oil squirters,
Wiesco forged pistons,
Farndon std length conrods,
Balanced bottom end
std 2wd head, new valves etc
2wd exhaust manifold
4wd inlet manifold (thinking im going to need a 14mm spacer)
EFR 7064, T4 0.92
Link G4 Xtreme
1000cc EV14's
70mm DBW Throttle
COP
100m thick large tank IC (Airtec)
I think the exhaust manifold, plenum and headwork are my limits of hitting 550 (maybe even 500) other than that the spec is kinda there I think - oh might need cams now too. IIRC there was a pretty much standard escos with 490bhp? (just supporting parts like injectors)
26-04-2020, 11:10 AM
#59
I'm thinking along the same lines, or speak to whoever will tune it and ask them to advise nearer the time. The 666 cam does sound a good option though.
With solid lifter setups I've been told the cam profiles need to be designed for solid lifter cams, are people using 'NA' profiled camshafts for them or getting custom grounds made?
COLEYST200 - I've seen a few success stories of fitting them, how comes your's wouldn't fit? I know the T3 flange needs to be cut off and a T4 flange fitted.
26-04-2020, 04:30 PM
#61
PassionFord Post Troll
Not saying they are the best I just prefer the power delivery of a 4 cylinder turbo, ive been in a e92 m3 and it doesnt feel anywhere near a 400hp cossie even though its just as quick
26-04-2020, 06:14 PM
#62
I'm thinking along the same lines, or speak to whoever will tune it and ask them to advise nearer the time. The 666 cam does sound a good option though.
With solid lifter setups I've been told the cam profiles need to be designed for solid lifter cams, are people using 'NA' profiled camshafts for them or getting custom grounds made?
COLEYST200 - I've seen a few success stories of fitting them, how comes your's wouldn't fit? I know the T3 flange needs to be cut off and a T4 flange fitted.
With solid lifter setups I've been told the cam profiles need to be designed for solid lifter cams, are people using 'NA' profiled camshafts for them or getting custom grounds made?
COLEYST200 - I've seen a few success stories of fitting them, how comes your's wouldn't fit? I know the T3 flange needs to be cut off and a T4 flange fitted.
Steve
Last edited by steveboyslim; 26-04-2020 at 06:19 PM.
26-04-2020, 08:54 PM
#63
Steve, when nms rebuilt the engine for the previous owner of my saff, they designed 2 billet camshafts to their own design for a t4 turbo. It has double valve springs and solid lifters. I have heard the cam profiles were a bit all over the place and and in fairness to nms it was probably down the fact a t4 was never fitted.
Would this mean if I change the cams I will have to refit new shims?
Would this mean if I change the cams I will have to refit new shims?
26-04-2020, 10:15 PM
#64
Advanced PassionFord User
27-04-2020, 07:03 AM
#65
Steve
27-04-2020, 07:05 AM
#66
Steve, when nms rebuilt the engine for the previous owner of my saff, they designed 2 billet camshafts to their own design for a t4 turbo. It has double valve springs and solid lifters. I have heard the cam profiles were a bit all over the place and and in fairness to nms it was probably down the fact a t4 was never fitted.
Would this mean if I change the cams I will have to refit new shims?
Would this mean if I change the cams I will have to refit new shims?
Steve
27-04-2020, 11:14 AM
#68
PassionFord Post Whore!!
27-04-2020, 01:15 PM
#69
The question was about resizing shims with a cam change mechanical profile to mechanical profile.
I was making an assumption they would be more mild cam profile, so piston to valve clearance, coil bind height, stem seal clearance, lobe clearance etc would be ok.
Also I assumed they would check as it is part of any process.
Steve
Last edited by steveboyslim; 27-04-2020 at 01:18 PM.
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