Engine weight

[Kitcat]

Based on above, my 1700 Kent Crossflow weighs about 260 & the T9 tranny 90 for 350 total. I like to think of it as being stout, not heavy.

 

My car weighs 1225lbs, or 875lbs for everything minus power train.

 

The wheel/tire combo is about 30 lbs per corner so that's another 120 lbs., leaving the rest of the car at about 755 lbs.

 

 

Lightness abounds.

[SR27.Seth]

 

 

Seth, do these weights include exhaust manifold?

 

It includes cast iron exhaust manifolds with turbo and downpipe- that alone is between 35-45# (depending on the size of your turbo)

[Mandurath]

Heheh reading on the weights, my 2.3t may weigh more than his v8 doh!

[Mandurath]

Well, an LS1 looks to weigh in at 460 lbs (bacomatic number) and i got 512lbs from another forum where he weighed his (2.3T) wet, running including T-5 trans at 521. So minus trans, that puts it in the 440 lbs range. So, counting my trans, intercooler, and rear assembly I will already be heavier than some here more than likely. Thats without a car around the running gear....... So much for lightweight, though, compared to a dealer bought car it will still be light.

[JohnK]

My 2 cents worth - 2004 S2000 engine and trans, both dry, no manifold 405lbs on 3 bathroom scales ( not accuracy certified !)

While I'm pretty fond of Honda engineering that Caterham ( which Ford ?) and 6-speed of yellowss7's is pretty attractive, not to mention LIGHT.

Cheers,

[yellowss7]

It's a Rover K Series, not a Ford :ack: :d It's a great engine, very light, revvy and sounds fabulous. Unfortunately, due to the exchange rate, its really pricey now.

 

See http://www.minister-power.com/support/index.htm Go to Engines, then MG/Rover engines, then mine is the 205. The 240 hp one is a real beast!!!

 

Add in the Dry sump, Flywheel, clutch, water rail, exhaust, starter, air filter, and dyno run and then multiply by $2.00++ and then add in shipping, customs duty, and state sales tax. :cry: :cry: Exchange rate was only $1.47 when I bought it. Look at the 240 hp version if you really want to cry. Tom

 

Oh, and that doesn't include the cost of the Caterham 6 speed!!!!

 

When ever someone asks me what it costs to build a 7, I say, it depends on how stupid you are :d

 

Pretty, stupid eh?:crazy:

[JohnK]

Back when I started reading the UK Se7ens list I couldn't help but see that the Rover was a very attractive unit. Very light, loves to rev, sounds great, lots of uprating parts, and very much in the spirit of the Se7en. I envy you having that setup. I took the conservative/sensible (read,cowardly) route with the S2000 engine. I was in a position to build up a Zetec (which is more like the Rover than the Honda) and tune it properly; had access to a machine shop with machinist I could work with, a dyno and over a year's very successful experience working with electronic engine management systems. Then I saw a car with the S2000 engine - 240 HP and a 6-speed that the Honda engineers had matched to the power curve of the engine. I realized it could take me a huge amount of time as well as money to get that much power and anywhere near the drivability, and then I had to guess at matching the ratios of a pretty expensive transmission to what I would build - and decided I probably didn't have enough time left to accomplish all that and get it all right. The downside, beyond this engine's being heavy is that it's tall - it's ideal if you put it behind you, but then it wouldn't be a Se7en. I'm thinking of converting to Hinduism so that I can come back (reincarnate) and get started on my Se7en sooner in my next lifetime ;-) .

Congrats on your choice and acquisition of the Rover and the Caterham trans.

Cheers,

[slngsht]

I have some updated numbers on the LS1/T56 combo from another forum:

Just for the record, we weighed out LS1&T56 on 3 scales. The drivetrain was complete with engine, harness, intake, all front end accessories (alt, a/c, ps pump) T56 with 4qts Dexron and our engine mounts. All-up weight was 603 lbs, with 260lbs at each engine mount and 83lbs on the tranny mount.

 

T56 weighs 140 lbs, so engine + all accessories (not including ex man?) =460 lbs.

I have no idea how much A/C comp weighs... probably 20 lbs? so, 440 lbs is probably a good number for the LS1.

 

With a TKO500 tranny, the combo will come in at 510.

[BobDrye]

Seth:

The total weight of my 7, full of gas is only 1131 lbs. I don't think that my intake is much lighter than the stock one that you are using. I'm probably saving 20 lbs or so on the exhaust manifold. I should be ready for the dyno by March. (Hoping for over 550 hp)

 

 

 

SR20DET Motor 375# (I know it is heavy for an all aluminum block, but the turbo and manifold weigh 32 lbs alone and the Crank weighs a bit over 35lbs!!- more than some v-8s, but how else would you expect a stock bottom end to take 600 horsies?) Trans (5spd) 90# total 470#

 

[locostv8]

Well, an LS1 looks to weigh in at 460 lbs (bacomatic number) and i got 512lbs from another forum where he weighed his (2.3T) wet, running including T-5 trans at 521. So minus trans, that puts it in the 440 lbs range. So, counting my trans, intercooler, and rear assembly I will already be heavier than some here more than likely. Thats without a car around the running gear....... So much for lightweight, though, compared to a dealer bought car it will still be light.

I started into this intending on using a 2.3T, got one laying around, till I compared weight to a 302 or 351.

[slngsht]

Seth:

The total weight of my 7, full of gas is only 1131 lbs.

 

That's pretty impressive. I gotta really sit down and figure out why my car weighs so much (besides the drivetrain)

[Boxologist]

I would suspect the amenities. Like bolts than mount the seat. cup holder (DVDR drive), dual 5 1/4 disk drives. 10 MB hard drive:lol: alarm system (120 lb rottweiler). these items can really weight down a performance car. I hope Arya can sort thru these best he can with u not there.:bigears:

 

[slngsht]

I would suspect the amenities. Like bolts than mount the seat. cup holder (DVDR drive), dual 5 1/4 disk drives. 10 MB hard drive:lol: alarm system (120 lb rottweiler). these items can really weight down a performance car. I hope Arya can sort thru these best he can with u not there.:bigears:

 

Alot of that is already gone. but additional weight is coming with heavier roll bar. Not sure how much weight will be saved this go-around. One thing that is for sure, a higher % will be over the rear wheels

[locostv8]

Something that would be interesting would be to have Ary measure the thickness of removed tubing.

[mhc]

Ref the weight of the engine.

Its always the total weight of the car and the weight distribution ,front to rear that counts.

S2000 engine in a Westfield 480 kgs less petrol, 52--48 split less driver.

http://usa7s.com/aspnetforum/upload/1090477673_IMG_0714[1]

http://usa7s.com/aspnetforum/upload/2131775772_IMG_0715[1]

[slngsht]

Something that would be interesting would be to have Ary measure the thickness of removed tubing.

 

You mean for the roll bar?

 

The rest of the frame is .065 I believe.

[slngsht]

Ref the weight of the engine.

Its always the total weight of the car and the weight distribution ,front to rear that counts.

S2000 engine in a Westfield 480 kgs less petrol, 52--48 split less driver.

 

Weight distribution is very important, but let's not discount power to weight ratio as well as power to drag coef * frontal area.