s2000 Kitten
06-25-2015 | 02:56 PM
#51
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Joined: Nov 2013
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Regarding the engine in the Reliant Kitten it is a bit experimental being a long stroke version of the Honda F20C S2000 engine but done properly with all the right components.
The block is Darton sleeved with a bore of 89mm and a stroke of 99mm giving 2464cc, rods are Saenz custom design specifically for this engine fitted with L19 bolts, pistons are 2 ring with 18mm pins, compression ratio is 12:1 exactly, throttle bodies are again a bit different being 60mm tapered Jenvey bodies but 55mm at the butterfly but these do give a nice inlet tract and the engine runs on what is basically a standard Honda S2000 exhaust. The cams are from Cat with a duration at 1mm of 274 and 264 degrees respectively on the inlet and exhaust on the high speed lobes and 226 / 225 degrees on the low speed lobes, all a bit wild but these big long stroke engines can take them, lobe centreline angles on the high speed lobes are 104 and 100 degrees inlet and exhaust. There is no adjustable cam timing to map so that will save ages of time at the rollers, as for the VTEC cross over point we will have to optimise that during the mapping but I fancy it will be in the 5000 RPM plus range. The engine runs on a dry sump system and will run a fair bit of vacuum. The ECU is a DTA S80 and the map installed actually runs the engine so there are no strange timing issues. There is a MAP sensor and inlet air temperature sensor fitted but only for barometric and temperature compensation and to future proof the loom, injectors are 600cc and run at 3.5 bar fuel pressure, hope this will run on standard Shell Optimax but can add octane booster.
Until we get it on the rollers we wont obviously know where the peak power will be, frictional losses will knock the top off the power curve so a hard cut at 8500 RPM and a soft cut say 150 RPM earlier.
All this info came direct from my engine builder.
The block is Darton sleeved with a bore of 89mm and a stroke of 99mm giving 2464cc, rods are Saenz custom design specifically for this engine fitted with L19 bolts, pistons are 2 ring with 18mm pins, compression ratio is 12:1 exactly, throttle bodies are again a bit different being 60mm tapered Jenvey bodies but 55mm at the butterfly but these do give a nice inlet tract and the engine runs on what is basically a standard Honda S2000 exhaust. The cams are from Cat with a duration at 1mm of 274 and 264 degrees respectively on the inlet and exhaust on the high speed lobes and 226 / 225 degrees on the low speed lobes, all a bit wild but these big long stroke engines can take them, lobe centreline angles on the high speed lobes are 104 and 100 degrees inlet and exhaust. There is no adjustable cam timing to map so that will save ages of time at the rollers, as for the VTEC cross over point we will have to optimise that during the mapping but I fancy it will be in the 5000 RPM plus range. The engine runs on a dry sump system and will run a fair bit of vacuum. The ECU is a DTA S80 and the map installed actually runs the engine so there are no strange timing issues. There is a MAP sensor and inlet air temperature sensor fitted but only for barometric and temperature compensation and to future proof the loom, injectors are 600cc and run at 3.5 bar fuel pressure, hope this will run on standard Shell Optimax but can add octane booster.
Until we get it on the rollers we wont obviously know where the peak power will be, frictional losses will knock the top off the power curve so a hard cut at 8500 RPM and a soft cut say 150 RPM earlier.
All this info came direct from my engine builder.
07-24-2015 | 10:25 AM
#56
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Joined: Nov 2013
Posts: 53
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Made a good bit of progress with the chassis and engine swap. Got it all running and took it to the rolling road for a mapping session, which resulted in having 318bhp (278 bhp at the wheels) and 209 lbs/ft of torque. Decided to fit a larger twin row radiator, just in case. Still haven't got the shell finished although I have had it on the chassis and made up most of the inner flanges/fixings.
Went to Kirkbride drag strip (not what it's built for) last Saturday as I was eager to have a drive with the new engine and just check all is working as it should. Had a good few runs and left at lunch time as I hadn't got the shell fitted and was concerned about the weather as rain was forecast.
First 1/4 mile run I managed a 12.9 then getting a bit quicker and ended up with an 11.9 so quite pleased with the build and had no major issues apart from not being able to chuck the gears at it fast enough.
Short video of me at drag strip, only got beaten by one other car.
Drag Strip
Went to Kirkbride drag strip (not what it's built for) last Saturday as I was eager to have a drive with the new engine and just check all is working as it should. Had a good few runs and left at lunch time as I hadn't got the shell fitted and was concerned about the weather as rain was forecast.
First 1/4 mile run I managed a 12.9 then getting a bit quicker and ended up with an 11.9 so quite pleased with the build and had no major issues apart from not being able to chuck the gears at it fast enough.
Short video of me at drag strip, only got beaten by one other car.
Drag Strip
01-22-2016 | 01:36 PM
#60
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Joined: Jul 2008
Posts: 674
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Not been on here for a while, but been busy. Got the car finished ish, done a couple of 1/4 mile drag strip days at Kirkbride and a day at Blyton Park to get the set up a bit nearer.
My link
My link
