Hybrid stroker project
05-31-2012, 03:45 PM
#167
Race Car
Thread Starter
Yeah, Wednesday is my usual night. At least I can get a few runs in. I'm hoping to get some other locals to bring their cars up too. I'd really like to see a couple of these LS conversions run. I think they'll be somewhat surprised at how "fast" they are.
05-31-2012, 03:47 PM
#168
Race Car
Thread Starter
06-01-2012, 12:12 AM
#169
Rennlist Member
In keeping with my tradition of posting crap , good and bad. I'll keep this thread updated with my escapades weekly since I don't see myself running any other engine besides my combo.
I had been driving the car daily and trying to track down a Misfire that was random at low boost and constant if I even turned the **** slightly. I thought I had it figured out by completely unhooking the MSD box because I was able to run a bit more boost without trouble.
My plan was to change the cam and go back up to the track but I decided I'd wait until the lash caps can in in case I need them.
So rather than that I thought we'd try some timing and just get practice.
Went to the track again last night. It was somewhat in productive. I just kept blowing the tires off every run. It was so bad that my logs look like first gear is 5 gears. The car hardly started moving before half track. I'm not sure why it's do bad, but my guess is that the tires I have on now are not as sticky as the other khumho's (these are both radial comparisons, I have drag radials too). I am also needing to re-learn how to launch it w/o the two step.
Anyway, the best I ran was a 12.71. The mph was down a little in the quarter but up in the 1/8. Kinda weird but I think it was also a little leaner at 10-11 psi. Oh yes, I had to run the boost lower to even get off the line and to avoid the misfire that reared its ugly head once again.
Onto the misfire. Josh and I swapped every electronic part over after my last run because it got really bad on that run and then carried over to the pit. Even became a no start. Finally after changing out the parts I cut apart the s/r harness and wiggled the wires and voila.... Started right up.
So a new harness will be installed and by the next time I run it I should have the cam on and be able to run some boost....oh yes....tires!!!! I will have to have a sticky set on....
Good news is that after hitting the rev limiter repeatedly, lugging, and all kinds of crap it still drove home perfectly and to work perfectly today.
That's it for this weeks drag entertainment...what a drag.,.,
I had been driving the car daily and trying to track down a Misfire that was random at low boost and constant if I even turned the **** slightly. I thought I had it figured out by completely unhooking the MSD box because I was able to run a bit more boost without trouble.
My plan was to change the cam and go back up to the track but I decided I'd wait until the lash caps can in in case I need them.
So rather than that I thought we'd try some timing and just get practice.
Went to the track again last night. It was somewhat in productive. I just kept blowing the tires off every run. It was so bad that my logs look like first gear is 5 gears. The car hardly started moving before half track. I'm not sure why it's do bad, but my guess is that the tires I have on now are not as sticky as the other khumho's (these are both radial comparisons, I have drag radials too). I am also needing to re-learn how to launch it w/o the two step.
Anyway, the best I ran was a 12.71. The mph was down a little in the quarter but up in the 1/8. Kinda weird but I think it was also a little leaner at 10-11 psi. Oh yes, I had to run the boost lower to even get off the line and to avoid the misfire that reared its ugly head once again.
Onto the misfire. Josh and I swapped every electronic part over after my last run because it got really bad on that run and then carried over to the pit. Even became a no start. Finally after changing out the parts I cut apart the s/r harness and wiggled the wires and voila.... Started right up.
So a new harness will be installed and by the next time I run it I should have the cam on and be able to run some boost....oh yes....tires!!!! I will have to have a sticky set on....
Good news is that after hitting the rev limiter repeatedly, lugging, and all kinds of crap it still drove home perfectly and to work perfectly today.
That's it for this weeks drag entertainment...what a drag.,.,
06-02-2012, 02:18 AM
#170
Rennlist Member
This sounds like an awesome engine... planning a dyno trip? I'd love to see what it puts down! I've got to wonder how well this would work on regular 'ol gasoline... I know E85 is god's gift to boost, but it's just not available here 
06-02-2012, 03:16 AM
#171
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You know Tom, some time ago a guy went to a lot of effort to make a harness gig and source connectors/pins and nobody wanted to pay the price he wanted to build it. There is a lot of time involved in cutting wires and crimping connectors and we are not in China. I doubt much has changed in the last couple of years.
06-02-2012, 07:13 AM
#172
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-Dana
06-02-2012, 07:28 AM
#173
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My 1/4 mile speed when I had a known HP from a dyno dynamics dyno was 103mph. The uncorrected dyno run I made 255hp. Me and the car are about 3200lbs. So mph indicates I should be making about 290hp (flywheel as all equations are based upon flywheel numbers). Figuring a 15% drivetrain loss, that would say 247rwhp. So reality is very close to equation.
To run a 3200lb car (Sids car may be a little lighter than mine, but sid is larger than me..I assume the same weight) to 114.8mph, it needs 398hp. Assuming 15% loss I would expect to see 340ish rwhp. Keep in mind he is running 12psi boost.
My 103 mph run was with a K27/6 at 16psi.
I also did some tuning in runs with my Vitesse S2R, and on 13psi boost, I ran 104mph.
Keep in mind, all of these runs were on pump gas.
So with a little less boost, Sid is almost 100hp more.
-Dana
06-02-2012, 02:43 PM
#174
Rennlist Member
I think quite a bit of the gain was from the added mid range power of the added cubes. However, I think there is much more to be gained still and I can't lie. I think the lightweight parts, my cleaning up the combustion chambers (in shrouding the valves since I have a larger bore). Or there is another bit of work I did with the quench area that may turn out to be of great benefit.
Do you have any pics of completed combustion chambers or quench area? I would love to see a pic of the shrouding you did. TIA
06-02-2012, 04:42 PM
#175
Race Car
Thread Starter
Shawn I didn't take any photos of it. The un-shrouding I did was around the intake outside edge of the combustion chamber. If you look at the factory head you'll see that the seat and chamber have to make a turn back towards the cylinder. I opened that area up and polished it out a little. If you go through with the larger valves you'll certainly need to do this. You can use the head gasket and dowels to make your mark. Remember though you'll be using the 103mm cometic and you don't want to go quite all the way out to that point. Just inside it. You'll see what I mean once you match up the gasket to the head and then to the block.
You can also clean up the exhaust a little as well and definitely take a look at the seat to liner matching, I have seen most be off by .063 very often.
You can also clean up the exhaust a little as well and definitely take a look at the seat to liner matching, I have seen most be off by .063 very often.
06-02-2012, 04:51 PM
#176
Race Car
Thread Starter
My estimation:
My 1/4 mile speed when I had a known HP from a dyno dynamics dyno was 103mph. The uncorrected dyno run I made 255hp. Me and the car are about 3200lbs. So mph indicates I should be making about 290hp (flywheel as all equations are based upon flywheel numbers). Figuring a 15% drivetrain loss, that would say 247rwhp. So reality is very close to equation.
To run a 3200lb car (Sids car may be a little lighter than mine, but sid is larger than me..I assume the same weight) to 114.8mph, it needs 398hp. Assuming 15% loss I would expect to see 340ish rwhp. Keep in mind he is running 12psi boost.
My 103 mph run was with a K27/6 at 16psi.
I also did some tuning in runs with my Vitesse S2R, and on 13psi boost, I ran 104mph.
Keep in mind, all of these runs were on pump gas.
So with a little less boost, Sid is almost 100hp more.
-Dana
My 1/4 mile speed when I had a known HP from a dyno dynamics dyno was 103mph. The uncorrected dyno run I made 255hp. Me and the car are about 3200lbs. So mph indicates I should be making about 290hp (flywheel as all equations are based upon flywheel numbers). Figuring a 15% drivetrain loss, that would say 247rwhp. So reality is very close to equation.
To run a 3200lb car (Sids car may be a little lighter than mine, but sid is larger than me..I assume the same weight) to 114.8mph, it needs 398hp. Assuming 15% loss I would expect to see 340ish rwhp. Keep in mind he is running 12psi boost.
My 103 mph run was with a K27/6 at 16psi.
I also did some tuning in runs with my Vitesse S2R, and on 13psi boost, I ran 104mph.
Keep in mind, all of these runs were on pump gas.
So with a little less boost, Sid is almost 100hp more.
-Dana
Again though, a dyno is really only good for baseline and mod comparisons IMO. Throwing out an arbitrary number is a waste.
Considering most of my runs are below factory boost levels I'm pretty happy with the gains I've made so far. There is no doubt it'll make good power on boost.
For those not familiar with high altitude effects, try turning the boost down to 8psi and see how it feels.
06-02-2012, 06:28 PM
#177
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06-02-2012, 08:27 PM
#178
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370whp at 12psi is just mind boggling!! Took me 25psi to get that. Even allowing for differences in dyno's that's stupidly impressive Sid. Can't wait to see how this and the next engine develop!
06-02-2012, 08:57 PM
#179
Race Car
Thread Starter
We'll see what I can come up with this week and then next week it's cam and boost for sure.
After that I'll be letting others be the testers for 8v as I will be swapping the head and turbine housing. (maybe I'll swap turbine housing first idk)
Btw, I am so confident in this bottom end that I let my newly liscenced 16 give it a go the other night. Umm, well, it hit the rev limiter more times than how many feet it moved. He'll have to use his talon for the high school drags I'm thinking
06-02-2012, 09:20 PM
#180
You know Tom, some time ago a guy went to a lot of effort to make a harness gig and source connectors/pins and nobody wanted to pay the price he wanted to build it. There is a lot of time involved in cutting wires and crimping connectors and we are not in China. I doubt much has changed in the last couple of years.