KevinW

iTrader: (1)

i just blew my motor again and might want to go with something a little more reliable. just trying to figure out how much ppl on an average spend on their swaps.

rynberg

Wrong forum.

Why did you blow the motor (again)?

KevinW

iTrader: (1)

dont know, was racing a farrari and at the top of 4th i felt the car hesitate and now it idles like it has a chipped seal. idles like crap but feels ok after 2k rpm

payne

What kind of Ferrari? And were you winning?

You can do an LS1 swap for 7k easily if you are thrifty, 10k with all the bells and whistles like I did - new clutch, cam, poly motor mounts, aftermarket shifter, etc...

rynberg

Maybe that's the problem....quite a few guys on here making 400+ rwhp for a lot of miles. It takes proper AFRs, timing, and good fuel -- AND a GOOD engine. **** does happen, of course, but I see a lot of people on here doing stupid things and then wonder why they blew a motor. My apologies if you don't fit in this category.

I'm not anti-LS1, but it's not like you can't blow a V8 up either. I've seen an awful lot of GM V8s not live to see 100k miles, too. That said, if I woke up in the morning and discovered someone had popped in an LS7 and did it RIGHT, I probably wouldn't complain...

quid

THis is just my opinion, but I would take the 7 or 10 thousand and get a ported 13B, single turbo, Apexi Power FC, and whatever else you do not have and build it right. Putting in a V-8 with the cltuch and transmission, even if it is an aluminum block, will definitly throw off the geometry of the Mazda. It will drive like a front heavy Fox Body mustang. Stay true brother and build the motor right.

payne

Dead wrong. again and again this arguement is made, and I have to tell you, a LS1 is IDENTICAL in weight to a 13B.

My buddies is 50.3/49.7 2880lbs
Another is 49.8/50.2 2840lbs

Ill have mine weighed soon and should be mid 2800 also, within .3% 50/50

I will be making 420smog legal rwhp and then with a 100 shot mid 500 rwhp and 600ftlbs. on pump gas. Try that in a rotary.

dohc-vtec_eg

well, i am pretty sure people dont get rx7's to pass smog. if u can pass smog with ur motor thats great for u. every 2 years u got something to brag about. i get my illegal smog for 180 in cali so i aint that mad about payin that every 2 years. i am pretty sure a rx7 can get to 500 whp and with NOS, nothing special.

saxyman990

Well now, that's not exactly true either. There's about a 25-30lb difference . Course, that's not nearly enough to be noticeable, and can easily be offset by laying off the snacks and munchies for a few months....

-Rob

payne

You arr right - it is 20-30lbs either way.

If you run stainless long tubes, single exhaust and no cats, with no AC and no PS, you will be 30bls lighter with a LS1.

If you run iron manifolds, dual exhaust, cats, AC, and PS, you will be a 30lbs heavier.

payne

500rwhp with a rx7 is:

1. much slower than 500rwhp in a LS1
2. VERY hard to do on 91 octane
3. very spendy

Im not here to start a flamewar, just clearing up LS1 misconceptions. I love RX7s and I love rotaries. I just happened to find a roller for cheap at the right time and went LS1.

I am doing for the pride of being smog legal. I should be in the mid 11s easily and complete refable, and with a simple 100 shot in the 10s no problem. That is something that I would guess no rotary could do at stock weight.

They are getting dead serious about reffing cars in norcal, and being immune from that is a huge drive for me.

neit_jnf

iTrader: (17)

mazda should make an all aluminum 13b and 20b...

KevinW

iTrader: (1)

i dont have 7 grand and if i did buy another motor that was ported and all i still dont know how long it's going to last me.

KevinW

iTrader: (1)

and then you might have a passenger and it wouldnt matter i just wish these motors can take the beating like a V8 can

KevinW

iTrader: (1)

it was a 360 modena but it was the special addition that is all carbon fiber and aluminum and has an extra 45 HP i think and yes i was in front when this happened

payne

yeah, they are not that fast, but they sure sound great behind you at 7k rpm.

neit_jnf

iTrader: (17)

500 whp in a 13b can be considered a great acomplishment, reasons: small displacement, small "stroke", less termally efficient

500 whp in a 5.7 L V8 is, well, really easy

rynberg

And it's completely wrong.

Um, no, some of us pass smog just fine. It's people like you who run completely illegal cars and then whine when the long arm of the law smacks them down.

Once my new setup is broken in and tuned, my goal is 350+ rwhp IN SMOGGABLE form on pump gas. I should be able to pull into a smog station right off the street and pass. The only thing illegal on my car will be the downpipe which no one cares about anyway. If I'm feeling snerky, I can even swap out the hi-flow for a midpipe, drop some 100 octane in, raise the boost, and make 400+ rwhp.

Not quite to Payne's smoggable level, but not too shabby for a rotary...

I'm not dissing V8s, but I think the rotary is getting the short end of the stick -- too many people are bolting up a single turbo on a cheaply rebuilt motor and running 15+ psi on pump gas and are surprised when they lose a motor in 8k miles.

rynberg

dp, damn forum's acting up again

FLA94FD

First I would have someone check on your motor.

An all all-aluminum 6L 400HP crate motor will run you $7300. An all all-aluminum 7L small block 505HP crate motor will run you $13,395. With the bolt ons they will both weigh less 20lbs + than 13B. You would also need custom headers $800-$1000 the other bolt on stuff $1500 or more and the subframe. At the end of the day to do it right would be about the same as 20B. On the up side with the right gearing you should be able to get around 30mpg on the road.

Mdessouki

iTrader: (7)

yeah cause those crate motors are the only way to get reliable horsepower out of a lsx.

fastrx7man

iTrader: (63)

Kevin...that sucks...I was over at Lee's the other day and saw my old motor sitting in his garage.

I don't know why you've popped 2 motors in 9 months. Who tuned the car once you put the new motor in it?

I think someone stated it in the very beginning...it's all about the tuning. I had the car for 2 years, 5000 miles and 250 passes at the track with no motor issues. (I did break a lot of other things...)

If you stay with the 13B make sure it's tuned right....

theantirotor

iTrader: (1)

man its always the same. spouting off completely false info and then falling back on the "my tiny engine is more impressive" crutch when you get smacked down.

rynberg

Would the chickenshit who gave me a neg reputation point for the post above care to come forward and explain why? LOL

payne

Wasnt me... even though I think you gave me a negative rep when you bashed LS1s in another thread that I started, lol.

I just want a fast car that the po po cant mess with, dont really care about my online rep. The props that I got out at the last San Jo meet mean a lot more than online rep...