Rob Morris Posted July 18, 2002 Share Posted July 18, 2002 I'm about to fit a set of fast road cams (cheap mod) to my std Vauxhall and thought it would be fun to who could guess the actual output recorded on the rolling road. Figures will be known prior to Trackday on 31st Rob M. 40th Anniversary Vauxhall Man www.slipstream-trackdays.co.ukid=red> Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted July 18, 2002 Share Posted July 18, 2002 Err, excuse my ignorance, but which std V/X is fitted to the 40th anniversary cars? 1) Classic 1600 8v 2) 1800 8V 3) 2.0 ltr carb. 4) 2.0 ltr injected. Sporting chance required!!! Link to comment Share on other sites More sharing options...
Rob Morris Posted July 18, 2002 Author Share Posted July 18, 2002 Only the best! but thanks for asking 16V 2000cc with claimed 175bhp by Caterham To be honnest I think only 5 Anniversary's were fitted with this engine due to it being a £3,500 option. Worth every penny. I have had it roling roaded as standard (figure not being given away) and intend to check it again folowing fitment. This will be followed by a simple report for Low Flying headed "Cheap Power". I just hope that I get an increase? The cams are BP 270H Piper's being fitted with standard pulley's running 45mm Webbers & std engine management. Total cost of upgrade £250 for cams and cam-belt. Rob M. 40th Anniversary Vauxhall Man www.slipstream-trackdays.co.ukid=red> Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted July 18, 2002 Share Posted July 18, 2002 185 BHP Link to comment Share on other sites More sharing options...
mav Posted July 18, 2002 Share Posted July 18, 2002 182 bhp Link to comment Share on other sites More sharing options...
cskip Posted July 18, 2002 Share Posted July 18, 2002 178bhp Clive. X-flow - Not So Loud, But Still Proud! (Tech-Craft fitted!) Link to comment Share on other sites More sharing options...
Paul D Jones Posted July 18, 2002 Share Posted July 18, 2002 181BHP and the peak power will move up 400rpm and you loose 20lb/ft torque maybe. Paul. See My Car Here Link to comment Share on other sites More sharing options...
kenny. Posted July 19, 2002 Share Posted July 19, 2002 Mine gave 180bhp @ wheels in my old HPC on a well known and reputable rolling road. That was using a similar cam (QED 420H). It went to I85 with a change from standard caterham set up to 3D DTA unit and fitment of throttle pot (this change also made car tick over like an injection model). Revs were upped so I invested £80 in some Cossie big end bolts for insurance.......so depending on the rollers your using I'll go for 180 bhp @ 6750 rpm. Kenny SLR Link to comment Share on other sites More sharing options...
murph7355 Posted July 19, 2002 Share Posted July 19, 2002 750bhp. At the wheels. On Michelin Pilots. Link to comment Share on other sites More sharing options...
Rob Morris Posted July 19, 2002 Author Share Posted July 19, 2002 So far I hope that my good friend Alex has the correct answer. The interesting thing will be what percentage gain as a result of this cheap & simple modification more than the correct answer as engine vary depending on the luck of the draw, however, all Vauxhall should be able to achieve the same % gain. Still got my fingers crossed for 185bhp Rob M. 40th Anniversary Vauxhall Man www.slipstream-trackdays.co.ukid=red> Link to comment Share on other sites More sharing options...
EFA Posted July 19, 2002 Share Posted July 19, 2002 Rob, I believe a 10bhp increase is easily attainable, just not at the top end. I'll got for a 3bhp increase to 178bhp max, but 16bhp in the middle somewhere around 5k. Fat Arn Visit the K2 RUM siteid=red> See the Lotus Seven Club 4 Counties Area Website hereid=green> Link to comment Share on other sites More sharing options...
kenny. Posted July 19, 2002 Share Posted July 19, 2002 If we're talking @ the wheels then 15-20 bhp is the figure......155/160 up to 175/180bhp Kenny SLR Link to comment Share on other sites More sharing options...
stevefoster Posted July 19, 2002 Share Posted July 19, 2002 Depends which road.... My standard made 181 at a place in Amersham... Take it there if you want to be happy Elsewhere for realism. I guess 184 on trick fuel and a cold day. Steve My racing pics hereid=red> Hants (North) and Berkshire area club site hereid=red> Edited by - stevefoster on 19 Jul 2002 23:01:51 Link to comment Share on other sites More sharing options...
Rob Morris Posted July 20, 2002 Author Share Posted July 20, 2002 I could always fill the chassis tubes with helium, weigh the car and work on bhp / ton! I'll be more than happy with 10bhp mid-range, however, knowing my luck it will make 160 before throwing a rod just prior to the Trackday. Rob M. 40th Anniversary Vauxhall Man www.slipstream-trackdays.co.ukid=red> Link to comment Share on other sites More sharing options...
scooby dooby doo Posted July 24, 2002 Share Posted July 24, 2002 vernier pulleys may help as well. some cams are helped a fair bit by tweaking the timing of one relative to the other. certainly true for K seires supersport cams. but we're passing the borders of my knowledge here.... Dave Hooper - dmch2@lineone.net Link to comment Share on other sites More sharing options...
Rob Morris Posted July 24, 2002 Author Share Posted July 24, 2002 Hoopy, You've got just under a week to get that old battle bus ready for our Oulton date! How's it doing? Rob M. 40th Anniversary Vauxhall Man www.slipstream-trackdays.co.ukid=red> Link to comment Share on other sites More sharing options...
scooby dooby doo Posted July 24, 2002 Share Posted July 24, 2002 can't do oulton rob - i'm off to finland the next day where i've got 3 track days booked. I *will* be at cadwell in september though! Dave Hooper - dmch2@lineone.net Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted July 24, 2002 Share Posted July 24, 2002 I'll go for a 179BHP at the flywheel, 'cos I think Caterhams figures were over optimistic in the first place!!! Link to comment Share on other sites More sharing options...
EFA Posted July 24, 2002 Share Posted July 24, 2002 Chris, Talk about change your mind...... Was it not you that waxed lyrical about 133bhp from Caterhams 130bhp 1400K SS??? Or are you lot fianlly coming to terms with the fact that Dave Walkers rolling road is optimistic??? Stand clear...... Fat Arn Visit the K2 RUM siteid=red> See the Lotus Seven Club 4 Counties Area Website hereid=green> Link to comment Share on other sites More sharing options...
CHRIS CLARK Posted July 24, 2002 Share Posted July 24, 2002 Err, forgot to say that that Caterhams figures were over optimistic where the VAUXHALL unit was used (but you'd expect me to say that!) Arnie. I have happily (?) put myself in the frame by testing the old 1400 SS (133bhp) & the new 1800CPC (202BHP). Come to think of it so has PC etc. So c'mon on. Lets see what a 'real' V/X can do. Put yours on Dave Walkers rolling road too. Who knows, it may make 295 or more. At least it would be a current comparison with all the rest. If it makes less than your claimed then you have a good get out clause for Curborough (M the I). It's in your court..................................... Link to comment Share on other sites More sharing options...
Peter Carmichael Posted July 25, 2002 Share Posted July 25, 2002 Arnie has pleaded that the hours in traffic getting to DW's are enough to put him off, so we will need a trailer before we see K2RUM on the Emerald rolling road. Link to comment Share on other sites More sharing options...
EFA Posted July 25, 2002 Share Posted July 25, 2002 Peter, The dyno sheet for my car is on www.the-webbs.com You'll also realise that when compared through the same speed trap at COTT1 I was consistantly 2 or 3 mph faster than your much lighter. faster exiting Fradley type car. Fat Arn Visit the K2 RUM site See the Lotus Seven Club 4 Counties Area Website here Edited by - fat arnie on 25 Jul 2002 16:53:13 Link to comment Share on other sites More sharing options...
Peter Carmichael Posted July 25, 2002 Share Posted July 25, 2002 1mph quicker, I thought, (mine 103mph on 2nd timed run) than my slow exiting car (it wasn't working well around Fradley - I claim 29mph exit) and equipped with a sequential box rather than an h-pattern about to expire (you weren't suffering a half second pause while waiting to engage third). I think a comparison would be decent sport. It is part of the K2RUM mystique that means that everybody would like to know... I have been quoting 253bhp because that was the figure from DW's rolling road achieved on first run up in the state that competed at Curborough. On the day, we swapped to Dave Jackson's longer trumpets (1st run 251bhp and worse in other parts of the rev range) and with a fuelling change at the very top to correct overfuelling this produced 254bhp (and correlation everywhere else). The fuelling change was appropriate also to the shorter trumpets and I have retained these settings making the engine much perkier at its max power revs. There is now the distinct possibility that my engine is making a bit more than it had when it recorded 253 on DWs rollers. The format of the day means that I have direct comparison with Graham Ford's VX (much more powerful) and Dave Jackson's K (much less powerful), which is in keeping with what you would expect. *thumbup*253 bhp, up and running Link to comment Share on other sites More sharing options...
Peter Carmichael Posted July 25, 2002 Share Posted July 25, 2002 and just eyeballing your dyno curve, I reckon there is quite a bit more to come between 6000 and 7500. Did you draw the plot with a crayon? *thumbup*253 bhp, up and running Link to comment Share on other sites More sharing options...
Vanessa Morris Posted July 30, 2002 Share Posted July 30, 2002 The Results................... 145bhp at the wheels @ 6,500rpm this equates to approx 170bhp @ flywheel Not quite the figure I had hoped for, but I can report that there has a been a gain in mid- range. Sadly this was not measured prior to the swop. Good news is that the main jets went down from 180's to 170's, however, the figures show that the 45mm carbs (41mm chokes) fail to deliver enough air for peak power. Anyone got a pair of 48's I can try? Link to comment Share on other sites More sharing options...
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