Brunton M-Spec 1,600 pounds and LS POWER!!
07-31-2015, 10:31 PM
#121
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Your sig says "1600 lbs curb weight... being built", but you don't really know until it is built, full of fluid etc. I expected 1,600 but ended up at 1,711. That is full of fuel, my heavy steel race wheels and heavy LS7 clutch set up, and beefy T-56. I could get the car deep or under the 1,600s with lighter wheels and flywheel (and a TKO trans).
Larger interior space is not hard to imagine. Mine is tight! Bruton does make an XL model with more interior space.
I'm not down talking Exocet. There are a couple local guys building them and I look forward to seeing them at the track.
Until then... Talk is just talk...
07-31-2015, 11:09 PM
#122
Strong words... I'm not sure how you measured stiffer.
Your sig says "1600 lbs curb weight... being built", but you don't really know until it is built, full of fluid etc. I expected 1,600 but ended up at 1,711. That is full of fuel, my heavy steel race wheels and heavy LS7 clutch set up, and beefy T-56. I could get the car deep or under the 1,600s with lighter wheels and flywheel (and a TKO trans).
Larger interior space is not hard to imagine. Mine is tight! Bruton does make an XL model with more interior space.
I'm not down talking Exocet. There are a couple local guys building them and I look forward to seeing them at the track.
Until then... Talk is just talk...
Your sig says "1600 lbs curb weight... being built", but you don't really know until it is built, full of fluid etc. I expected 1,600 but ended up at 1,711. That is full of fuel, my heavy steel race wheels and heavy LS7 clutch set up, and beefy T-56. I could get the car deep or under the 1,600s with lighter wheels and flywheel (and a TKO trans).
Larger interior space is not hard to imagine. Mine is tight! Bruton does make an XL model with more interior space.
I'm not down talking Exocet. There are a couple local guys building them and I look forward to seeing them at the track.
Until then... Talk is just talk...
But hey, butthurt is free.
We can always line them up on the track sometime.
07-31-2015, 11:22 PM
#123
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The roll structure and tube placement in the Brunton scares me. Nothing is tied into anything important, the upper doesnt tie into the hard points on the car, the front is just a latticed box. I've actually seen the FEA sheets on the exocet. XP4 exocet was 1595 on the scales. Mine should be a few pounds lighter due to lighter components used, full of fuel, with an ls7 clutch and a t56 magnum.
But hey, butthurt is free. We can always line them up on the track sometime.
But hey, butthurt is free.
We can always line them up on the track sometime.Get your car done, post up some actual numbers... In YOUR thread.
Or just going around talking BS in other peoples...
Have a nice life.
08-02-2015, 04:38 PM
#124
The roll structure and tube placement in the Brunton scares me. Nothing is tied into anything important, the upper doesnt tie into the hard points on the car, the front is just a latticed box. I've actually seen the FEA sheets on the exocet. XP4 exocet was 1595 on the scales. Mine should be a few pounds lighter due to lighter components used, full of fuel, with an ls7 clutch and a t56 magnum.
But hey, butthurt is free. We can always line them up on the track sometime.
But hey, butthurt is free.
We can always line them up on the track sometime.Last edited by sciff5; 08-02-2015 at 04:48 PM.
08-03-2015, 06:11 PM
#127
08-05-2015, 12:35 PM
#129
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Awesome build, and great attention to detail. I wish I had the time to build and use something like this.
So, when is the TVS2300 getting bolted on? lol
Keep the pics coming.
So, when is the TVS2300 getting bolted on? lol
Keep the pics coming.
09-27-2015, 05:21 PM
#130
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Any Updates? How is your build coming along? I haven't seen any updates on this forum or USA7s.
I have a new set of drag radials MT 275/40-17s. Taking it to Bandimere in two weeks.
I have a new set of drag radials MT 275/40-17s. Taking it to Bandimere in two weeks.
09-28-2015, 07:44 AM
#131
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I'm more of a road course guy. I have set fast time of day at every timed event I have done this year! Simple less weight theory in action! My events have been at Blackhawk Farms mostly but one road race event at Milwaukee Mile. Fun track. I never raced it before for fear of concrete. Sadly two racers' cars fell victim to that concrete that day...
I also went to Road America for the 1st time! Wow, you cannot oversell that place! I love it! High speeds. I don't know exactly how fast I got down the main straight but can tell you it was over 150, as I needed 5th gear! Gets pretty loud with no roof or windshield! I was definitely hitting some aero limits at that speed. Need to think about a windshield and downforce.
Whooping up on C7 Z06s on track days was quite a thrill!
As far as drag racing, I picked up some Nitto DRs earlier, also in 275/40/17s. I probably should have waited for some MTs. But I got in a hurry. As luck would have it I got rained out whenever I had time to go drag racing until last week.
My previous best was a 11.4 @124.01 with a 1.815 60', on road race Hoosiers.
The DRs were not the miracle cure I hoped for. I only got four runs in because it was Honda Night at Greatlakes Dragaway.... I'll hold back on that rant...
1- 11.660 @125.41 w/ 2.020 60'
2- 11.879 @ 123.84 w/ 2.030
3- 11.576 @ 125.10 w/ 2.057
4- 11.973 @ 123.64 w/ 2.151 (spinning a lot)
My son got some cell phone video that I will post once I edit it down.
I started at 18 PSI, then went to 16 PSI for the last two. I'm hoping lower pressure will do the trick. I also couldn't work on my launch much with just the 4 runs thanks to the Hump Day Honda $#!+ Show...
I hope to get back to GLD this Wednesday.
Side note, a buddy of mine with essentially the same engine in his 69 Camaro came along. With his current tune he made 449 RWHP! Up from the 419 he rain with initial tune (I am basing my power estimate on).
I have some bigger headers coming from Brunton. Once I get those on I need to get to the Dyno and tuner myself!
09-28-2015, 10:11 PM
#132
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I'm a road course guy too. Unfortunately, the nearest track, High Plains Raceway, is about 100 miles from my house. On the other hand, Bandimere is about 4 miles away.
10-01-2015, 12:29 AM
#134
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I got back to the track today, and thanks to a smoother experience was able to get 11 runs (ironically) in in the 1st two hours! Thats good because after the sun goes down, so does grip.
This time I ran 12, 10 and then 8 PSI in my 275/40/17 Drag Radials.
I got more respectable 1.8XX 60' times and was rewarded with a bunch of 11 flats at 125 MPH.
My best of the day was 11.040 @125.33 with a 1.845 60'.
The little 7 must be intimidating, because a couple people red lighted against me...
I was so desperately close to the 10s... But traction was limited and going away as the track cooled. A couple guys told me they could hear the tires spin even as I shifted into 4th. I'm confident I will see 10s this spring with warmer track. I was hoping to run the DRs as my street tires. But it appears I may need to go even more aggressive on tire to get the best 1/4 mile times (deep 10s?).
I was happy though, I ran across this guy at the track. The Lambo was having traction issues also. He told me he ran a 11.5 @135 with a 2.2 60'. I didn't get to line up with him but felt pretty good about my budget home built running quicker!
[I also finally got a 0-60 time from my Speedhut GPS speedo!
3.03 seconds!
Again, painfully close to the 2.XX bragging rights...
Oh well, next year.
Murica'!
10-01-2015, 09:40 AM
#135
Such a great dual purpose setup!
Need a clutch modulation valve and bias ply tire on there if you want to drag race a manual successfully IMO. Will be a night/day difference. Unfortunately you should run a bias ply tire up front then as well to keep the car stable. A dedicated set of 15 rims with 28-29" bias ply in back and bias skinnies up front with a clutch valve should easily put you in the 1.5x range at your weight. Which should translate into sub 10.50 ET's.
Need a clutch modulation valve and bias ply tire on there if you want to drag race a manual successfully IMO. Will be a night/day difference. Unfortunately you should run a bias ply tire up front then as well to keep the car stable. A dedicated set of 15 rims with 28-29" bias ply in back and bias skinnies up front with a clutch valve should easily put you in the 1.5x range at your weight. Which should translate into sub 10.50 ET's.
10-01-2015, 05:20 PM
#137
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I think Shaun is shifting like my grandmother
The aero is certainly a factor. A FC RX7 is probably one of the slipperiest cars ever made.
Andrew
10-02-2015, 01:49 AM
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I played around with some online calculators and they seem to agree that my trap and HP estimates do not coincide. However, they say I have like high 200s RWHP, which I doubt. I'm thinking my abnormally low weight may not suit the formula.
I do want to hit the rollers to see what I'm making. Plus since Matt got 449 RWHP out of his very similar engine (LS7 cam, to my LS9), I'm hoping more can be squeezed out.
I just want to wait on these new, larger headers I have been promised first.
10-02-2015, 05:11 AM
#139
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Ouch! That hurts (every time you the it) Andrew! I don't think it is all weak shifting. Especially since I'm spinning tires on my 3-4 upshift.
I played around with some online calculators and they seem to agree that my trap and HP estimates do not coincide. However, they say I have like high 200s RWHP, which I doubt. I'm thinking my abnormally low weight may not suit the formula.
I do want to hit the rollers to see what I'm making. Plus since Matt got 449 RWHP out of his very similar engine (LS7 cam, to my LS9), I'm hoping more can be squeezed out.
I just want to wait on these new, larger headers I have been promised first.
I played around with some online calculators and they seem to agree that my trap and HP estimates do not coincide. However, they say I have like high 200s RWHP, which I doubt. I'm thinking my abnormally low weight may not suit the formula.
I do want to hit the rollers to see what I'm making. Plus since Matt got 449 RWHP out of his very similar engine (LS7 cam, to my LS9), I'm hoping more can be squeezed out.
I just want to wait on these new, larger headers I have been promised first.
Andrew
10-02-2015, 07:40 AM
#140
What are you shifting at RPM wise? My LS9 cam was a total turd below 5k or so. Which I actually liked. It helped with traction on a turbo car. I could see shifting around 7k with it on a manual. Curious to see where the power starts/drops off with the bugger cubes.