[BAzombie]

Ok .... am I trippin'?

My plans were always to buy a forged, stroked shortblock and throw a KB on top, but I think my plans are changing again.

The price for the shortblock, KB set-up, and the issues of upgrading the fuel system, transmission and rearend at once don't make me .

MHS has a few articles where they hit 300RWHP with a PI swapped and cammed 2v.
ModularHeadShop real world 300RWHP combo
One build went 330RWHP with stage 3 heads & cams.
ModularHeadShop Recession Buster 2V combo

I put down 262 RWHP & 301 RWTQ with stock PI cams (see mods in sig).

My question is what could I expect from a build like this ...

MMR 900 stroker w/ FRPP big bore iron block. (323ci/5.3L)
My MMR stage 2 PI heads
MHS stage 3 N/A cams
FRPP bullit racing intake
Stock cobra 39# injectors & a BAP
w/ 10.1 CR pistons

IF MHS can reach 300-330whp with the 4.6L, it seems reasonable that I could reach 380 with a 5.3L ... right?


380-400ish is what stock 2v's w/SC are running and that puts them towards the top of the stock internals limit. If I could reach that power and still be N/A with the bonus of just starting to scratch the potential of the motor I'd be .

This is something for next winter, not this one. I'm just in the " horse is hibernating ... owner is dreaming" portion of the year.

[1989Gt.]

Ill just say good luck to this! Id like to see you reach that goal but i think it might be a little high

[bens98gt]

Needs MMR Stage 2 or 3 trick flow heads and just 24 pounders. youll see 400 then. if not bump compression up to 11 to 1

[RockRacing]

The combination you listed as well as a good tune could definitely reach your power goals.

My car is making 290/309 with ported heads, XE270 cams, Mac long tubes, CAI, MSD ignition and a Reichard Racing intake (something to look at if you don't have the intake yet).
It has 18cc dished pistons (lower compression), not bored or stroked (still 4.6L) and doesn't even have a tune yet.

A good tune, and perhaps an electric water pump and maybe some pulleys should get you real close, if not to your goal.

[BAzombie]

An article that I read on the Reichard Racing intake showed that it made great power between 6k and 8k rpm, but lost a lot of torque in low to mid rpm range. That's exactly what you'd expect from a short runner intake.

Being mostly a cruiser/weekend warrior, I get booted of the track at 13.49 (vert) I didn't want to give up that much low end torque.

I believe the FRPP will flow good up to around 7200 and still preserve low end torque. I looked at HPS intake too but haven't found much info on RPM range of it. The MHS stage 3 cams are good to 7000 - 7500 rpm, hence the FRPP choice but nothing is set in stone being a year out.

MMR had mentioned the TF twisted wedge heads too, but their $2k without porting. I almost pulled the trigger on getting them when I spent $1400 on MMR stage 2 PI heads. They were just released the month I bought mine.

[ChrisJ]

Good luck is all I will say...

Look up some of ACmillr's old threads...

[BAzombie]

Originally Posted by ChrisJ I am just happy to see someone break the curve... Good job AC... Cant wait to see your times... Be happy for what the guy did...No bashing needed... From the day that AC came on here and said he was going for nice numbers N/A he has been told it couldn't happen...Im glad to see him prove everyone wrong (Myself Included)... I cant wait to see what the car is going to run N/A... Great job AC...

And he did that with 281ci. Gives me a lot more confidence to reach that with 323ci.

I still want to look more into the 5.3L stroker. All the builds I've seen so far have been 4V or FI. But I like the idea of the bigger bore unshrouding the valves and the stroker crank putting the bore x stroke back to sq.

Lots of research to do still. I'll have to troll some more of AC's threads. Thanks for the tip.

[tfofkyle]

subscribed. best wishes on your build!

[03_StangGuy]

Originally Posted by bens98gt Needs MMR Stage 2 or 3 trick flow heads and just 24 pounders. youll see 400 then. if not bump compression up to 11 to 1

Please back this up with something. The only claims near 400hp were from trick flow and they were rating crank power with no accessories.

[saxmanJJ]

There's a guy on the 99-04 forum that made over 390rwhp I believe with the Boss Modular block and a stroker crank.

[ChrisJ]

Originally Posted by BAzombie And he did that with 281ci. Gives me a lot more confidence to reach that with 323ci. I still want to look more into the 5.3L stroker. All the builds I've seen so far have been 4V or FI. But I like the idea of the bigger bore unshrouding the valves and the stroker crank putting the bore x stroke back to sq. Lots of research to do still. I'll have to troll some more of AC's threads. Thanks for the tip.

Hope you have the pockets for it then...

[NO_PI_NO_POWER]

Some Jesel's might help.

[BAzombie]

Originally Posted by tfofkyle subscribed. best wishes on your build!

Nothing happening til next winter.

Originally Posted by saxmanJJ There's a guy on the 99-04 forum that made over 390rwhp I believe with the Boss Modular block and a stroker crank.

Seen a thread where a marauder put down 390 thru an auto but that was with 4V. Only seen 1 2V build that was still N/A but never posted any #'s and only ran 12.9@109 in the 1/4.

Originally Posted by ChrisJ Hope you have the pockets for it then...

Original plan was for MMR's 900 stroker SB & KB or Whipple. But can't work in the tranny, fuel & rearend work needed with it. So the funds for the SC is going towards the +$999 for the 5.3 big bore upgrade, N/A cams and a intake that can flow to 7k - 7500.

The 10.1 cr is a compromise. Decent power N/A and upper limit for FI down the road.

[97S281]

Originally Posted by BAzombie The 10.1 cr is a compromise. Decent power N/A and upper limit for FI down the road.

I wouldn't do that. If you are going to stay N/A then fine but you will spend alot more in the long run if you do decide to run boost and want to lower your c.r. later on.

I would decide on the long term goal and build for that.

[bens98gt]

It was on some other forum i saw some guy had 400. It was carbed though. but it was just my guess with higher comp, with the 5.3L will hit it. itd be more race motor than street lol.

[ChrisJ]

boss 302 modular block

[na svt]

There are 400rwhp 2vs, 281ci, bb, and bb/strokers. It's all about how much money you wanna spend and how much strettability you wanna take out of the combo.

10:1 won't get yout here but it is safe with boost if decide you want FI later. With the right cams, heads, intake and 11.5:1 you could hit 380rwhp with a 281, over 400rwhp with a stroker and 425 or more with a bb/stroker.

The stroker and the big bore stroker would be very streetable at 400rwhp.

A build similar to an NMRA factory stock engine with 1 point less compression would be a great start, but adding cubic inches is the easiest way to add power.

I almost forgot, you must have the capability to spin the engine to 7500. The stock 96-98 ignition will get you there, the 99 and up ignition will not. You'll need a MSD MOD6 to get above 7200.

TFS heads
Edelbrock intake
large TB
90mm maf
11:1
custom cams
1 3/4 primary long tubes
380rwhp.

[BAzombie]

ChrisJ, nice little read. That's about all I can find on any Boss builds. A lot of talking but not much for results. Most builds never get run N/A, they're mostly FI when finished. That is why I'm wondering where a 5.3L N/A would get me.

na svt ... nice to know about the ignition. That's something I haven't thought about yet.

For reaching 7k+ rpms I've been looking at intakes from

Fox Lake Power Products, intake manifolds, assembled shortblocks, modular shortblocks, CNC modular heads, P-51 installation, comp cams, crower, ferrea components 1999

Logan Motorsports - SCT Tuning

BBK Mustang Dual Stage Upper Intake Manifold (96-04 4.6L 2V V8)


I like the idea of cruisin concept's dual stage intake. I can't find any info at all from someone who has actually used one. I seem to remember something about cobras with a dual runner that they were modifiying the butterfly's to stay open. That's probably more from being FI then the dual runner not working.

All I got to say is that I'm glad I'm starting my research 12+ months out.

[na svt]

I've seen a lotta high hp 2vs, none have had an intake other than the edelbrock.

The P-51 is okay but it's old technology.

The Logan, well I ahven't seen an n/a engine make any power with one.

BBK, it's a great concept but it's nto gonna out perform the edelbrock.


The tq and midrange power with the edelbrock and well spec'd set of cams is great. There's no need for an intake like the BBK if the cams are spec'd correctly.

Also, "SWEET2KSTANG's" statement (in this link boss 302 modular block) regarding strokers is crap. It's proven that stroker's make more power than big bores.

[03_StangGuy]

Originally Posted by na svt BBK, it's a great concept but it's nto gonna out perform the edelbrock. The tq and midrange power with the edelbrock and well spec'd set of cams is great. There's no need for an intake like the BBK if the cams are spec'd correctly.

Is the BBK dual intake actually release? The dual stage intake should give a good bit more low range power and i would think it would be tunable. For a street car that should be the best beat. You could tune it for torque on the street and set it up for peak power at the track.