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Re: Reliable 350bhp - What mods / how much?
[Re: barnacle]
#914019
08/10/2009 09:31
08/10/2009 09:31
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suba
Unregistered
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suba
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in fact - when I drove my son's 16v n/a, I found myself thinking "this is plenty for everyday driving". Its only 1% of the time that I can exploit the extra bhp, which means the £xx,xxx I've spent is pretty poor value for money And therein the point, of course. In day-to-day driving, what matters is bottom end torque, not absolute power. It's the big V8 technique of being able to put your foot down and rip up the tarmac at slow speeds that shifts you... I might venture to suggest that a 1200 Mk1 Punto is probably quicker than the majority of coupes to 30mph; the coupe has barely woken up. Back in the day before Joe sold his car to Eldinho, he couldn't get away from me on the twisties... the shortest straight, and off he went, but while it was twisty, he was mine. And others who have been to Red Lion meets when we've had a run will testify that the 16NA does not hang around. Is it time for my perennial suggestion that the best mod for a 20vt might be a *smaller* turbo? Less top end power, but more torque at the bottom... it'd be spinning all the time. (I recall driving a 1050 turbo 127 - an absolute hoot!) Very true about the N/A models on the twisties - I had a B road blat in my coupe (about 300bhp at the time) with a couple of 20V N/A cars with no suspension mods, and they were just as quick until we got to a D/C. However you just dont get the turbo kick of the turbo version - obviously. For a town car or motorway cruiser then I would be fine with an N/A coupe I think.....
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Re: Reliable 350bhp - What mods / how much?
[Re: Nigel]
#914141
08/10/2009 11:56
08/10/2009 11:56
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Joined: Dec 2005
Posts: 554 Nottingham
Cyclone
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Enjoying the ride
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OP
Enjoying the ride
Joined: Dec 2005
Posts: 554
Nottingham
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Jules - save your money, get the car you showed me and take it to the SAFE limit of the standard internals, with a good GT turbo (GT28RSR??). Spend a few quid on suspension and brakes and drive it with the smug satisfaction that you're almost as quick as the big power cars, but you've spent just a couple of grand to get there. If the big power bug bites, you can always develop the car in stages, but I reckon you'll be happy below 350bhp Agreed Nigel, but I'll hopefully have an E55 AMG with uprated crank / water pulley kit, uprated heat exchanger / intercooler pump and remap for when the big power bug bites Jules.
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Re: Reliable 350bhp - What mods / how much?
[Re: Cyclone]
#914143
08/10/2009 11:59
08/10/2009 11:59
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Hani
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Hani
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Good informative thread. So what's your decision Cyclone?
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Re: Reliable 350bhp - What mods / how much?
[Re: ]
#914151
08/10/2009 12:07
08/10/2009 12:07
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Joined: Dec 2005
Posts: 554 Nottingham
Cyclone
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Enjoying the ride
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Posts: 554
Nottingham
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Good informative thread. So what's your decision Cyclone? If I go the Coupe route then I reckon I'll be heading for a std Coupe to upgrade to a GT28RS with all of the associated bits to make it "reliable" , something like this: GT28RS 0.64 - 14psi wastegate actuator - Oil restrictor - Oil feed pipe - Oil return flange - Oil return gasket - T25 gasket - 5 stud gasket - Exhaust studs/nuts 3" downipe (5 stud flange) FMIC + pipework SIP + Cone and protection Walbro 255 fuel pump Fuel pump battery feed 3.8bar fuel pressure regulator Colder spark plugs Uprated EBV (ecu boost control) Race Cat Remap Jules.
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Re: Reliable 350bhp - What mods / how much?
[Re: Cyclone]
#914155
08/10/2009 12:13
08/10/2009 12:13
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suba
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suba
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You forgot a clutch. brakes and suspension are also not in the list...
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Re: Reliable 350bhp - What mods / how much?
[Re: Cyclone]
#914158
08/10/2009 12:15
08/10/2009 12:15
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Hani
Unregistered
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Hani
Unregistered
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Nice Jules. Standard engine then I think this will put you in the range of 320-340hp at a moderate boost level and good spool up. and I think it will be be reliable
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Re: Reliable 350bhp - What mods / how much?
[Re: ]
#914170
08/10/2009 12:27
08/10/2009 12:27
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Joined: Dec 2005
Posts: 554 Nottingham
Cyclone
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Enjoying the ride
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Joined: Dec 2005
Posts: 554
Nottingham
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You forgot a clutch. brakes and suspension are also not in the list... I know. The std car I've seen has a recent clutch so that can be ran until it decides to give up. Suspension wise it won't be being thrashed around bends etc too often so will just go for lowered springs / may need wishbones etc etc. Brakes wise then just better specced pads (Ferodo 2500?) and better discs, although last time I had a Coupe then uprated discs were a grey area. Jules.
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Re: Reliable 350bhp - What mods / how much?
[Re: Cyclone]
#914191
08/10/2009 12:53
08/10/2009 12:53
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suba
Unregistered
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suba
Unregistered
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For a road car I would run mintex 1144's - if the discs are in good condition leave them until they need to be replaced.
Lowering springs alone are worse than standard suspension.
fair do's about the clutch - but a standard one wont last long with the RS's thumpy power delivery, so you may well be limited or have issues when getting it mapped.
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Re: Reliable 350bhp - What mods / how much?
[Re: ]
#914268
08/10/2009 14:06
08/10/2009 14:06
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Joined: Dec 2005
Posts: 2,194 Göteborg, Sweden
Freddan72
Competition Level
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Competition Level
Joined: Dec 2005
Posts: 2,194
Göteborg, Sweden
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Here is a comparison between TB28 (controlled by PRV, FMIC, 2.75" Blueflame, RC), GT28RS 0.64 (Saint EBC, 3" exhaust, FMIC, RC) and TD04-19T (AEM EBC, FMIC, 2.75" Blueflame, RC). All three setups have been tested on the same RR. TB28: 1 bar @ 3050 rpm GT28RS: 1 bar @ 3250 rpm 19T: 1 bar @ 3300 rpm As you can see the OE turbo has best spool up. 19T is little bit slower than RS but not so much. This shows that a ball bearing turbo is not so much faster in spool up than a journal bearing turbo.
Last edited by Freddan72; 15/10/2009 09:57. Reason: More info
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Re: Reliable 350bhp - What mods / how much?
[Re: Freddan72]
#914315
08/10/2009 15:15
08/10/2009 15:15
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Squid
Unregistered
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Squid
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As a comparison, here is my RR graph from when I had a GT28RS on my car. At the time it had a 2.25" decat exhaust and standard internals with a Walbro fuel pump and a live map.
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Re: Reliable 350bhp - What mods / how much?
[Re: ]
#914489
08/10/2009 19:16
08/10/2009 19:16
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Joined: Nov 2006
Posts: 787 Midlands
ash_p
Club member 2001
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Club member 2001
Enjoying the ride
Joined: Nov 2006
Posts: 787
Midlands
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I have the gone for the 300-350bhp on stock internals (made 325bhp and 302ibft on a dastek dyno with outside temps of 37 degrees, should make more torque and bhp in the colder weather) and i would say its very drivable round town (mine seems to be very good off-boost). On the twisties its alot of fun, but can bite back afew times as it spools up very hard just over 3k and likes to torque steer But give it a straight bit of road and its really quick, i was following lucifer's Monaro with 500bhp and he wasn't pulling away very much, so they can hold there own till silly speeds. I would definitely recommend the gt28rsr and a fc map (what Leighton has done to my car this time round is unbelievable, 200% better then it was with a gtec2)
335bhp gt28rsr
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