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New PB for my TVR

 
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dbv8
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Joined: 21 Jul 2008
Posts: 477
Location: Barrow-in-Furness

1998 TVR Chimaera

PostPosted: Mon Aug 03, 2009 3:01 pm    Post subject: New PB for my TVR Reply with quote

With a second stage of nitrous adding 60 bhp on top of the progressive 125 bhp i ran a new PB of 11.726 @ 122.55 yesterday at York.

I came runner up in Street racer to Ian Kerrs 1000bhp Willys and he also beat me in the final of hotrod.
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10.612 @ 129.77
176.5 standing mile.
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mgbv8
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Joined: 18 Nov 2006
Posts: 5326


1975 MG MGB GT V8

PostPosted: Mon Aug 03, 2009 7:13 pm    Post subject: Reply with quote

Good numbers there dude!!
Looking at the terminal speed. I reckon you may have traction issues in the first 1/8th.
What were your 60 / 330 foot times like??

Perry
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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dbv8
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Joined: 21 Jul 2008
Posts: 477
Location: Barrow-in-Furness

1998 TVR Chimaera

PostPosted: Tue Aug 04, 2009 7:14 am    Post subject: Reply with quote

Cheers Perry.
I run 255/50/16 Mickey Thompson street ETS and am down to 10 psi.
After a mild burnout im only just getting into the 1.8s for 60 foot.
York dont give a 330 foot but according to the ipod (dynolicious) i got about 5.2.
The 1/8th was in 7.69 @ 95.

I blame the IRS and the suspension but would appreciate any ideas or tips
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176.5 standing mile.
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mgbv8
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Joined: 18 Nov 2006
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1975 MG MGB GT V8

PostPosted: Tue Aug 04, 2009 10:57 am    Post subject: Reply with quote

I've just watched your video!
You need a line lock. You are not getting those tyres anywhere near warm enough. The ET streets will pay you back big style, even with a gentle burnout like this.
You could also do with a quick mod to limit front suspension rebound as I mentioned before. Your car does has a LSD doesnt it?

http://www.youtube.com/watch?v=DFNOxHyMElo
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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dbv8
Knows His Stuff
Knows His Stuff


Joined: 21 Jul 2008
Posts: 477
Location: Barrow-in-Furness

1998 TVR Chimaera

PostPosted: Tue Aug 04, 2009 11:50 am    Post subject: Reply with quote

Was that a recent clip?
Just put some new ones on youtube last night.
Have a look under 'dbv8nos'.

I get a better burnout if i reverse into the bleaches.
Line locks on the list of jobs.

Lee at LA racing reckons the MTs dont need much of a burnout.

Can i ask what your car weighs Perry?
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176.5 standing mile.
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mgbv8
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Joined: 18 Nov 2006
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1975 MG MGB GT V8

PostPosted: Tue Aug 04, 2009 3:29 pm    Post subject: Reply with quote

The Mickey T's normally need a good burnout at the start of the day. Then just quick spins ups to clean them off.

My car is about 1200 kg's.

Perry
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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dbv8
Knows His Stuff
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Joined: 21 Jul 2008
Posts: 477
Location: Barrow-in-Furness

1998 TVR Chimaera

PostPosted: Sat Aug 08, 2009 7:23 am    Post subject: Reply with quote

Cheers Perry.
Im ordering an electric line lock kit from Real Steel so am looking forward to creating some proper tyre smoke at the end of the month.

On another note i remember reading you have an in car ignition retard unit. I spoke to Trevor (wizard of nos) last night and he wasnt sure the MSD retard unit would work with my ignition system and fuel injection.
The Real Steel catalogue item BY8782 claims to be 'universal'. Do you know anything about it?
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176.5 standing mile.
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mgbv8
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Joined: 18 Nov 2006
Posts: 5326


1975 MG MGB GT V8

PostPosted: Sat Aug 08, 2009 10:12 pm    Post subject: Reply with quote

I'm using the RS universal retard unit with my Mallory Hyfire 6AL unit ok.
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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dbv8
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Joined: 21 Jul 2008
Posts: 477
Location: Barrow-in-Furness

1998 TVR Chimaera

PostPosted: Thu Sep 10, 2009 2:12 pm    Post subject: Reply with quote

Another Pb was to be had at York on 30th Aug of 11.63 @ 122.6 which is nice Very Happy

I backed this up at Shakey last Saturday with a 11.64 @ 118 with the engine bogging with a very rich nitrous mixture over the line.
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176.5 standing mile.
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mgbv8
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Joined: 18 Nov 2006
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1975 MG MGB GT V8

PostPosted: Thu Sep 10, 2009 8:24 pm    Post subject: Reply with quote

Dave!
It is Dave isnt it DBV8??

You need to get your car on a dyno now. You need to see what AFR's are like on a nitrous run. And then re jet to suit as long as you know you have good bottle pressure.

How much gas are you spraying now?

I find that running 250 of gas on a full bottle will give me good results. But when I've done 3 passes with this amount. The fourth pass will be poop as the bottle pressure drops too quickly (even with 900psi at the start) and I run rich on fuel over the line.

I tested this at the pod recently.The first 3 passes were all 10's. The bottle had 11lbs and 3 oz's in it.
The 4th and 5th passes were mid 11's and I had 900psi to start with, but after the 4th and 5th runs the bottle pressure had dropped to below 800psi and I was chugging agross the line with too much petrol.

Just something you might want to try out if you have a spare bottle??

Perry
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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topcatcustom
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Joined: 09 Aug 2008
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Location: Essex


PostPosted: Thu Sep 10, 2009 8:28 pm    Post subject: Reply with quote

Time you got a 2nd bottle Pel...
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mgbv8
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Joined: 18 Nov 2006
Posts: 5326


1975 MG MGB GT V8

PostPosted: Thu Sep 10, 2009 8:53 pm    Post subject: Reply with quote

Tom!
I've got 3 bottles mate. And another 2 for backup at the moment.
It's just a bit expensive to fill them all at once !!
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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Coops
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Joined: 17 Nov 2006
Posts: 6049
Location: Newbury, Berks

1986 Ford Capri

PostPosted: Thu Sep 10, 2009 9:35 pm    Post subject: Reply with quote

i must get a second bottle sorted,
keep saying i'll get another.
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MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Rotrex C38-91 supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 404 RWHP, (4.6)
New Forged 4.8 V8 kitted out with the dogs Cajones of parts and a procharger D1SC. 2017 Very Happy
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
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dbv8
Knows His Stuff
Knows His Stuff


Joined: 21 Jul 2008
Posts: 477
Location: Barrow-in-Furness

1998 TVR Chimaera

PostPosted: Mon Sep 14, 2009 7:50 am    Post subject: Reply with quote

Its Derek by the way.

I ran 11.6 @ 118 in the morning with the car bogging.
I then drove to a TVR meeting where they had a rolling road.
On the rollers with using the gas the car tried to climb off and was wheelspinning.
The AF dropped below 10:1 so i swapped the fuel jets and the ratio came above 13:1 and was running much better.
On returning to Shakey the next day my terminal was up over 120 but my starts werent as good so only an 11.8.
I keep my pressure up using bottle heaters and pressure switches.
I have a twin line feeding my stage 1 now which is good for 150bhp but im going to have twin 11lb bottles feeding this next time so pressure drop will be kept to a minimum.
A third bottle supplies the second stage jetted for 100 bhp (just in case) Wink

Ive wrote a begging letter to nitron to cut their quote of 1800 for a set of shocks and springs that i can fine tune for the strip.
Why is the best always so expensive?
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176.5 standing mile.
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